Employment discrimination is a form of discrimination based on race, gender, religion, national origin, physical or mental disability, and age by employers. Earnings differentials or occupational differentiation is not in and of itself evidence of employment discrimination. Discrimination can be intended and involve disparate treatment of a group or be unintended, yet create disparate impact for a group.
|Part of a series on|
- 1 Definition
- 2 Evidence
- 3 Neoclassical explanations
- 4 Non-neoclassical approach
- 5 Critique of the neoclassical approach
- 6 Government’s efforts to combat discrimination
- 7 Protected categories
- 8 Legal protection
- 9 By region
- 10 External links
- 11 See also
- 12 Notes and references
- 13 Bibliography
In neoclassical economics theory, labor market discrimination is defined as the different treatment of two equally qualified individuals on account of their gender, race, age, disability, religion, etc. Discrimination is harmful since it affects the economic outcomes of equally productive workers directly and indirectly through feedback effects. Darity and Mason  summarize that the standard approach used in identifying employment discrimination is to isolate group productivity differences (education, work experience). Differences in outcomes (such as earnings, job placement) that cannot be attributed to worker qualifications are attributed to discriminatory treatment.
In the non-neoclassical view, discrimination is the main source of inequality in the labor market and is seen in the persistent gender and racial earnings disparity in the U.S. Non-neoclassical economists define discrimination more broadly than neoclassical economists. For example, the feminist economist Deborah Figart  defines labor market discrimination as “a multi-dimensional interaction of economic, social, political, and cultural forces in both the workplace and the family, resulting in different outcomes involving pay, employment, and status”. That is, discrimination is not only about measurable outcomes but also about unquantifiable consequences. It is important to note that the process is as important as the outcomes. Furthermore, gender norms are embedded in labor markets and shape employer preferences as well worker preferences; therefore, it is not easy to separate discrimination from productivity-related inequality.
Although labor market inequalities have declined after the U.S. Civil Rights Act of 1964, the movement towards equality has slowed down after the mid-1970s, especially more in gender terms than racial terms. The key issue in the debate on employment discrimination is the persistence of discrimination, namely, why discrimination persists in a capitalist economy.
Gender earnings gap or the concentration of men and women workers in different occupations or industries in and of itself is not evidence of discrimination. Therefore, empirical studies seek to identify the extent to which earnings differentials are due to worker qualification differences. Many studies find that qualification differences do not explain more than a portion of the earnings differences. The portion of the earnings gap that cannot be explained by qualifications is then attributed to discrimination. One prominent formal procedure for identifying the explained and unexplained portions of the gender wage differentials or wage gap is the Oaxaca-Blinder decomposition procedure.
Another type of statistical evidence of discrimination is gathered by focusing on homogeneous groups. This approach has the advantage of studying economic outcomes of groups with very similar qualifications.
In a well-known longitudinal study, the University of Michigan Law School (U.S.A.) graduates were surveyed between 1987 and 1993, and later between 1994 and 2000 to measure the changes in the wage gap. The group was intentionally chosen to have very similar characteristics. Although the gap in earnings between men and women was very small immediately after graduation, it widened in 15 years to the point that women earned 60 percent of what men earned. Even after factoring in women's choice of working for fewer hours, and worker qualifications and other factors, such as grades in law school and detailed work history data, in 2000 men were ahead of women by 11 percent in their earnings, which might be attributed to discrimination.
Other studies on relatively homogeneous group of college graduates produced a similar unexplained gap, even for the highly educated women, such as Harvard MBAs in the United States. One such study focused on gender wage differences in 1985 between the college graduates. The graduates were chosen from the ones who earned their degree one or two years earlier. The researchers took college major, GPA (grade point average) and the educational institution the graduates attended into consideration. Yet, even after these factors were accounted for, there remained a 10-15 percent pay gap based on gender. Another study based on a 1993 survey of all college graduates had similar results for black and white women regarding gender differences in earnings. Both black women and white women made less money compared to white, non-Hispanic men. However, the results of earnings were mixed for Hispanic and Asian women when their earnings were compared to white, non-Hispanic men. A 2006 study looked at Harvard graduates. The researchers also controlled for educational performance such as GPA, SAT scores and college major, as well as time out of work and current occupation. The results showed 30 percent of the wage gap was unexplained. Therefore, although not all of the unexplained gaps attribute to discrimination, the results of the studies signal gender discrimination, even if these women are highly educated. Human capitalists argue that measurement and data problems contribute to this unexplained gap.
One very recent example of the employment discrimination is to be seen among female Chief Financial Officers (CFOs) in the US. Although 62% of accountants and auditors are women, they are only 9% when it comes to the CFO post. According to the research not only are they underrepresented in the profession, but they are also underpaid, 16% less on average. 
Audit (or matched pairs) studies are done to examine hiring discrimination. In order to examine racial discrimination, the Urban Institute relied on a matched pairs study. They studied the employment outcomes for Hispanic, white and black men who were between the ages 19–25 in the early 1990s. The job position was entry-level. Thus, they matched pairs of black and white men and pairs of Hispanic and non-Hispanic men as testers. The testers applied for the advertised openings for the new positions. All of the testers were given fabricated resumes where all characteristics but their race/ethnicity was nearly identical. In addition, they went through training sessions for the interviews. If both people in the pair were offered the job or if both were rejected, the conclusion was there was no discrimination. However, if one person from the pair was given the job while the other was rejected, then they concluded there was discrimination. The Institute found out that black men were three times more likely to be refused for a job compared to white men; while the Hispanic men were three times more likely to be discriminated.
The Fair Employment Council of Greater Washington, Inc. did a similar test for women via pairing testers by race. The study found that the white female testers had higher chances of call back for interviews and job offers compared to black female testers. The percentage for interviews was by 10 percent more for the white testers. Among those interviewed, 50 percent white women were offered the job, while only 11 percent of black candidates received jobs offers. The white testers were also offered higher pay for the same job in cases where the same job was also offered to the black testers. The pay difference was 15 cents per hour more for the white candidates. Furthermore, black women were "steered" toward lower level jobs, while white women were even given some higher-level positions that were unadvertised.
A matched-pairs study of homogeneous group audit experiment was done in the restaurants in Philadelphia, United States. Pseudo candidates handed their resumes to a random worker in the restaurants for the resume to be forwarded to the manager, which removed the effect of first impression on the employer. Also, the resumes were written in a three-level scale based on the qualifications of the pseudo applicants and resumes for each qualification level were delivered in three separate weeks. The results showed that male applicants were favored significantly. Men had higher interview callbacks or job offers. In addition, men did even better in high-pay restaurants compared to low-pay ones. In the low-price restaurants, for each man who received a job offer, the woman was rejected 29 percent of the time. There were no such cases where a man did not get the job offer but a woman did. In the high-priced restaurants, when the man got an offer, the woman was rejected 43 percent of the time. The same pattern that signaled discrimination was observed for the interviews. At the high-priced restaurants, women had 40 percent less chance of being interviewed and 50 percent less chance of receiving the job. Therefore, based on this study, it is correct to conclude discrimination in the same job may lead to gender wage discrimination. Note the high-priced restaurants are more likely to offer higher wages and higher tips for its workers compared to those with low prices,.
Another experiment is the study of the effect of "blind" symphony orchestra auditions by Goldin and Rouse. In this case, the gender of the candidate was not known by the election committee because the auditions were done behind a curtain. Thus, only the skills were considered. As a result, the number of women accepted increased after “blind” auditions from less than 5 percent in 1970 to 25 percent in 1996 in the top five symphony orchestras in the U.S. In other words, a change occurred. This study tests for discrimination directly. The finding implies there was gender discrimination against woman musicians before the adoption of the screen on identity. However, this discriminatory practice was eliminated after the adoption and only qualifications of the individuals were taken into account.
Darity and Mason  summarize results of discriminatory behavior observed in other countries on the basis of "correspondence tests". In this type of tests, the researchers design fabricated resumes that signal the ethnicity of the pseudo applicants via the names on the resumes and send these letters to the employers. However, the qualifications written in the resumes are comparable. In England, Afro-American, Indian or Pakistani names were not called back for the interviews but Anglo-Saxons were called. In Australian audits, Greek or Vietnamese names had the same result; Anglo-Saxons were favored. According to the experiment done in the University of Michigan’s study, strikingly, even the “skin shade” and physical features of the individuals had negative effects the further the skin color and physical features were from white characteristics.
From court cases
Darity and Mason  summarize the court cases on discrimination, in which employers were found guilty and huge awards were rewarded for plaintiffs. They argue that such cases establish the existence of discrimination. The plaintiffs were women or non-whites (St. Petersburg Times, 1997; Inter Press Service, 1996; The Chicago Tribune, 1997; The New York Times, 1993; the Christian Science Monitor, 1983; Los Angeles Times, 1996). Some examples are the following: In 1997, the allegations for the Publix Super Markets were “gender biases in on the job training, promotion, tenure and layoff policies; wage discrimination; occupational segregation; hostile work environment” (St. Petersburg Times, 1997, pp. 77). In 1996, allegations for Texaco were “racially discriminatory hiring, promotion and salary policies” (Inter Press Service, 1996; The Chicago Tribune, 1997, pp. 77). The six black workers, who were the plaintiffs, gave the taped racist comments of the white corporate officials as evidence (Inter Press Service, 1996; The Chicago Tribune, 1997). In 1983, the General Motors Corporation was sued both for gender and racial discrimination (the Christian Science Monitor, 1983). In 1993, the Shoney International was accused of “racial bias in promotion, tenure, and layoff policies; wage discrimination; hostile work environment (The New York Times, 1993, pp. 77) ”. The victims were granted $105 million (The New York Times, 1993). In 1996, the plaintiffs of the Pitney Bowes, Inc. case were granted $11.1 million (Los Angeles Times, 1996).
Neoclassical labor economists explain the existence and persistence of discrimination based on tastes for discrimination and statistical discrimination theories. While overcrowding model moves away from neoclassical theory, the institutional models are non-neoclassical.
Tastes for discrimination
The profitability of the company that discriminates is decreased, and the loss is "directly proportional to how much the employer's decision was based on prejudice, rather than on merit." Indeed, choosing a worker with lower performance (in comparison to salary) causes losses proportional to the difference in performance. Similarly, the customers who discriminate against certain kinds of workers in favor of less effective have to pay more for their services, in the average.
If a company discriminates, it typically loses profitability and market share to the companies that do not discriminate, unless the state limits free competition protecting the discriminators.
However, there is a counter-argument against Becker's claim. As Becker conceptualized, discrimination is the personal prejudice or a "taste" associated with a specific group, originally formulated to explain employment discrimination based on race. The theory is based on the idea that markets punish the discriminator in the long run as discrimination is costly in the long run for the discriminator. There are three types of discrimination, namely: employer, employee and customer.
In the first one, the employer has a taste for discriminating against women and is willing to pay the higher cost of hiring men instead of women. Thus, the non-pecuniary cost brings an additional cost of discrimination in dollar terms; the full cost of employing women is the wage paid plus this additional cost of discrimination. For the total cost of men and women to be equal, women are paid less than men. In the second type, the male employees have a distaste for working with women employees. Because of the non-pecuniary cost, they must be paid more than women. In the third type, the customers or clients have a distaste for being served by woman employees. Therefore, the customers are willing to pay higher prices for a good or a service in order not to be served by women. The as-if non-pecuniary cost is associated with purchasing goods or services from women.
Becker's theory states that discrimination cannot exist in the long run because it is costly. However, discrimination seems to persist in the long run; it declined only after the Civil Rights Act, as it was seen in the economic history. Regardless, it is argued that Becker’s theory holds for occupational segregation. For instance, men are more likely to work as truck drivers, or the female customers are more likely to choose to be served by women lingerie salespersons because of preferences. However, this segregation cannot explain the wage differentials. In other words, occupational segregation is an outcome of group-typing of employment between different groups but consumer discrimination does not cause wage differentials. Thus, customer discrimination theory fails to explain the combination of employment segregation and the wage differentials. However, the data points out the jobs associated with women suffer from lower pay.
Edmund Phelps  introduced the assumption of uncertainty in hiring decisions. When employers make a hiring decision, although they can scrutinize the qualifications of the applicants, they cannot know for sure which applicant would perform better or would be more stable. Thus, they are more likely to hire the male applicants over the females, if they believe on average men are more productive and more stable. This general view affects the decision of the employer about the individual on the basis of information on the group averages.
Blau et al.  point out the harmful consequences of discrimination via feedback effects regardless of the initial cause of discrimination. The non-neoclassical insight that is not part of the statistical discrimination sheds light onto uncertainty. If a woman is given less firm-specific training and is assigned to lower-paid jobs where the cost of her resigning is low based on the general view of women, then this woman is more likely to quit her job, fulfilling the expectations, thus to reinforce group averages held by employers. However, if the employer invests a lot on her, the chance that she will stay is higher.
This non-neoclassical model was first developed by Bergmann. According to the model, outcome of the occupational segregation is wage differentials between two genders. The reasons for segregation may be socialization, individual decisions, or labor market discrimination. Wage differentials occur when the job opportunities or demand for the female-dominated sector is less than the supply of women. According to the evidence, in general female dominated jobs pay less than male dominated jobs. The pay is low because of the high number of women who choose female dominated jobs or they do not have other opportunities.
When there is no discrimination in the market and both female and male workers are equally productive, wages are the same regardless of type of the job, F or M jobs. Assume the equilibrium wages in job F is higher than that of the M jobs. Intuitively, the workers in the less paying job will transfer to the other sector. This movement ceases only when the wages in two sectors are equal. Therefore, when the market is free of discrimination, wages are the same for different types of jobs, provided that there is sufficient time for adjustment and attractiveness of each job is the same.
When there is discrimination in the M jobs against women workers, or when women prefer the F jobs, economic outcomes change. When there is a limit of available M jobs, its supply decreases; thus, wages of the M jobs increase. Because women cannot enter to the M jobs or they choose the F jobs, they “crowd” into F jobs. Consequently, higher supply of F jobs decreases its wage rates. Briefly, segregation causes the gender wage differentials regardless of the equal skills.
Another striking point of overcrowding model is productivity. Since women in the F jobs cost less, it is rational to substitute labor for capital. On the contrary, it is rational to substitute capital for labor in the M jobs. Therefore, overcrowding causes wage differentials and it makes women less productive although they were potentially equally productive initially.
The question of why women prefer working in female-dominated sectors is an important one. Some advocate this choice stems from inherently different talents or preferences; some insist it is due to the differences in socialization and division of labor in the household; some believe it is because of discrimination in some occupations.
Institutional models of discrimination indicate labor markets are not as flexible as it is explained in the competitive models. Rigidities are seen in the institutional arrangements or in the monopoly power. Race and gender differences overlap with labor market institutions. Women occupy certain jobs as versus men. However, institutional models do not explain discrimination but describe how labor markets work to disadvantage women and blacks. Thus, institutional models do not subscribe to the neoclassical definition of discrimination.
The internal labor market
The firms hire workers outside or use internal workforce based on worker progress, which plays a role in climbing the promotion ladder. Big firms usually put the workers into groups to have similarity within the groups. When employers think certain groups have different characteristics related to their productivity, statistical discrimination may occur. Consequently, workers might be segregated based on gender and race.
Primary and secondary jobs
Peter Doeringer and Michael Piore  established the dual labor market model. In this model, primary jobs are the ones with high firm-specific skills, high wages, good promotion opportunities and long-term attachment. On the contrary, secondary jobs are the ones with less skill requirement, lower wages, less promotion opportunities and higher labor turnover. The dual labor market model combined with the gender discrimination suggests that men dominate the primary jobs and that women are over-represented in the secondary jobs.
The difference between primary and secondary jobs also creates productivity differences, such as different level of on-the-job training. Moreover, women have lower incentives for stability since benefits of secondary jobs are less.
Moreover, lack of informal networking from male colleagues, visualizing women in the female dominated jobs and lack of encouragement do affect the economic outcomes for women. They are subject to unintentional institutional discrimination which alters their productivity, promotion and earnings negatively.
The under-representation of women in top-level management might be explained by the “pipeline” argument which states that women are newcomers and it takes time to move toward the upper levels. The other argument is about barriers that prevent women from advance positions. However, some of these barriers are non-discriminatory. Work and family conflicts is an example of why there are fewer females in the top corporate positions.
Yet, both the pipeline and work-family conflict together cannot explain the very low representation of women in the corporations. Discrimination and subtle barriers still count as a factor for preventing women from exploring opportunities. Moreover, it was found out that when the chairman or CEO of the corporation was a woman, the number of women working in the high level positions and their earnings increased around 10-20 percent. The effect of female under-representation on earnings is seen in the 1500 S&P firms studied. The findings indicate women executives earn 45 percent less than male executives based on the 2.5 percent of executives in the sample. Some of the gap is due to seniority, yet mostly it was because of the under-representation of women in CEO, chair or president positions and the fact that women managed smaller companies.
Non-neoclassical economists point out subtle barriers play a huge role in women’s disadvantage. These barriers are difficult to document and to remove. For instance, women are left out of male’s network. Moreover, the general perception is men are better at managing others, which is seen in the Catalyst’s Fortune 1000 survey. The 40 percent of women executives said that they believed man had difficulty when they were managed by women. A separate study found out majority believed in “women, more than men, manifest leadership styles associated with effective performance as leaders,… more people prefer male than female bosses”. In another study in the U.S. about origins of gender division of labor, people were asked these two questions “When jobs are scarce, men should have more right to a job than women?” and “On the whole, men make better political leaders than women do?” Some answers indicated discriminatory act.
Critique of the neoclassical approach
Neoclassical economics ignores logical explanations of how self-fulfilling prophecy by the employers affect the motivation and psychology of women and minority groups and thus it alters the decision making of individuals regarding human capital. This is the feedback explanation that correlates with the drop in human capital investment (such as more schooling or training) attainment by women and minorities.
Moreover, power and social relationships link discrimination to sexism and racism, which is ignored in the neoclassical theory. Furthermore, along with the classical and Marxist theory of competition, racial-gender structure of the job is related to the bargaining power and thus wage differential. Therefore, discrimination persists since racial and gender characteristics shape who gets the higher paying jobs, both within and between occupations. In short, the power relationships are embedded in the labor market, which are neglected in the neoclassical approach,.
In addition, critics have argued that the neoclassical measurement of discrimination is flawed. As Figart  points out, conventional methods do not put gender or race into the heart of the analysis and they measure discrimination as the unexplained residual. As a result, we are not informed about the causes and nature of discrimination. She argues that gender and race should not be marginal to the analysis but at the center and suggests a more dynamic analysis for discrimination. Figart argues gender is more than a dummy variable since gender is fundamental to the economy. Moreover, the segmentation in the labor market, institutional variables and non-market factors affect wage differentials and women dominate low-paid occupations. Again, none of these is because of productivity differentials nor are they the outcome of voluntary choices. Figart also indicates how women’s jobs are associated with unskilled work. For that reason, men don’t like association of “their” jobs with women or femininity, skills are engendered.
Although empirical evidence is a tool to use to prove discrimination, it is important to pay attention to the biases involved in using this tool. The biases might cause under or over-estimation of labor market discrimination. There is lack of information on some individual qualifications which indeed affect their potential productivity. The factors such as motivation or work effort, which affects incomes, are difficult to be scaled. Moreover, information regarding the type of college degree may not be available. In short, all the job qualification related factors are not included to study gender wage gap.
An example for underestimation is the feedback effect of labor market discrimination. That is, women may choose to invest less in human capital such as pursuing a college degree based on the current wage gap, which is also a result of discrimination against women. Another reason may be the childbearing responsibilities of women standing as a negative impact on women's careers since some women may choose to withdraw from the labor market with their own will. By doing so, they give up opportunities, such as the firm-specific training that would have potentially helped with their job promotion or reduction in the wage gap. An example of over-estimation of gender discrimination is men might have been more motivated at work. Therefore, it is wrong to equate unexplained wage gap with discrimination, although most of the gap is a result of discrimination, but not all.
Furthermore, empirical evidence can also be twisted to show that discrimination does not exist or it is so trivial that it can be ignored. This was seen in the results and interpretation of the results of Armed Forces Qualifying Test, (AFQT). Neal and Johnson  claimed the economic differences in the black and white labor markets were due to the "pre-market factors," not to discrimination. Darity and Mason’s  study of the same case disagrees with the findings of Neal and Johnson’s . They take into account factors such as age family background, school quality and psychology into consideration to make the adjustments.
Government’s efforts to combat discrimination
The history of government-sanctioned discrimination
Although in late 20th-early 21st century discrimination is illegal, historically governments sanctioned and legally supported discrimination against certain groups. The worst forms of discrimination in recent history have been committed by governments elected through popular vote. An example would be the anti-semitic practices of Nazi-Germany, which human capital theorists claim would not have happened had free markets prevailed, because, according to them, discrimination would have caused losses. The argument is based on the idea that government officials and politicians do not care about losses as much as companies do; as a result they have less incentive not to discriminate.
Another example is the case of U.S. when a law was passed in the early 1900s, based on popular sentiment among the white population, to require applicants for civil service jobs to submit photographs. At the time blacks in the U.S. had started to compete for jobs that had previously been all-white jobs. After the passage of the law, the number of blacks in federal employment plummeted for decades.
Another example is in early 20th century comes from South Africa, where mine owners preferred to hire black workers because they were lower wage workers. In response the white majority successfully persuaded the government to enact laws that highly restricted the blacks' rights to work (see Apartheid).
Why the government should intervene to address discrimination?
Blau et al.  sum up the argument for government intervention to address discrimination. First, discrimination prevents equity or fairness, when an equally qualified person does not receive equal treatment as another on account of race or gender. Second, discrimination results in inefficient allocation of resources because workers are not hired, promoted or rewarded based on their skills or productivity.
Becker claimed discrimination in the labor market is costly to employers. His theory is based on the assumption that in order to survive in the existence of competitive markets, employers cannot discriminate in the long run. Strongly believing in the perfect functioning of markets without government or trade-union intervention, it was claimed that employer discrimination declines in the long run without political intervention. On the contrary, intervention of human capital investment and regulation of racial interactions make it worse for the disadvantaged groups. Moreover, it was claimed discrimination could only persist due to the "taste" for discrimination and lower education level of blacks explained the labor-market discrimination.
However, based on the empirical study, either human capital theory or Becker’s tastes theory does not fully explain racial occupational segregation. That is seen with the increase in black work force in the South as an effect of Civil Rights laws in the 1960s. Therefore, human-capital and "taste-for-discrimination" are not sufficient explanations and government intervention is effective. Becker's claim about employers would not discriminate as it is costly in the competitive markets is weakened by the evidence from real life facts. Sundstrom  points out, it was also costly to violate the social norms since customers could stop buying the employer's goods or services; or the workers could quit working or drop their work effort. Moreover, even if the workers or the customers did not participate in such behaviors, the employer would not take the risk of experimenting by going against the social norms. This was seen from the historical data that compares the economic outcomes for the white and black races.
Looking at the position of women in World War II U.S. history
Women worked in the U.S. industrial sector during the World War II. However, after the war most women quit jobs and returned home for domestic production or traditional jobs. The departure of women from industrial jobs is argued to represent a case of discrimination.
The supply theory claims voluntary movement because women worked due to extraordinary situation and they chose to quit. Their involvement was based on patriotic feelings and their exit depended on personal preferences and it was a response to feminist ideology. On the contrary, demand theory claims working class women changed occupations due to high industrial wages. Tobias and Anderson  present the counter argument for supply theory. Furthermore, there were both housewives and working class women, who had been working prior to the war in different occupations. According to Women's Bureau's interviews, majority of women who had been working wanted to continue to work after the war. Despite their will, they were laid off more than men. Most of them possibly had to choose lower-paying jobs.
The exit pattern shows their quit was not voluntarily. There were pressures women faced, such as change in position to janitorial job, more or new responsibilities at work, and additional or changed shifts that would not fit their schedules, which were all known by the management. Women lay-off rates were higher than men. Briefly, women were treated unequally postwar period at the job market although productivity of women was equal to that of men and women's wage cost was lower.
Supply and demand theories do not provide sufficient explanation regarding women's absence in industrial firms after the war. It is wrong to associate patriotism with the war-time women workers since some housewives quit their jobs at early periods of the war when the country needed their help the most. Some of the housewives were forced to quit as the second highest lay-off rate belonged to them. If their only concern was the well-being of their country at the war time, less persistence to exit would have been observed.
The demand theory partially holds as there were women who worked pre-war time for occupational and wage mobility opportunities. However, these experienced women workers voluntarily quit working more than housewives did. The reason is work-experienced women had many opportunities. However, women with less options of where to work, such as African-Americans, older married women, housewives and the ones working in lowest paying jobs, wanted to keep their jobs as long as possible. Thus, their leave was involuntarily.
Although women's job performance at least as good as men's, instead of trying to equalize pays, women's wages were kept below than men’s. Women had higher lay-off rates but also they were not rehired despite the boom in the auto industry. Some argue this was due to the lack of a civil rights movement protecting the rights of women as it did for black men. This explanation is unsatisfactory since it does not explain anti-women worker behavior of the management or lack of protection from unions. Kossoudji et al.  believe it was due to the need for two separate wage and benefits packages for men and women. Women had child care responsibilities such as day care arrangements and maternity leave.
U.S. anti-discrimination laws
Before the passage of the Civil Rights Act of 1964 in the U.S., employment discrimination was legal and widely practiced. The newspaper ads for various jobs indicated racial and gender discrimination explicitly and implicitly. These behaviors were all built on the assumption that women and blacks were inferior. At the turn of the 21st century, discrimination is still practiced but to a lesser degree and less overtly. The progress on the evident discrimination problem is visible. However, the effect of past is persistent on the economic outcomes, such as historical wage settings that influence current wages. Women are not only under-represented in the high-rank and high-paid jobs, but they are also over-represented in the secondary and lower-paid jobs. The interviews, personal law, wage data and confidential employment records with salaries along with other evidence show gender segregation and its effects on the labor market.
Although there is some inevitable occupational segregation based people’s preferences, discrimination does exist. Moreover, persistence of discrimination remains even after government intervention. There is a decline in the wage gap due to three reasons: male wages decreased and women’s wages increased; secondly, the human capital gap between the two genders and experience gap have been closing; thirdly, legal pressures decreased discrimination but there is still inequality in the national economy of the U.S.
The correlation of Civil Rights Act and decrease in discrimination suggests the Act served its purpose. Therefore, it is correct to say leaving discrimination to diminish to the competitive markets is wrong, as Becker had claimed,. In 1961, Kennedy issued an executive order calling for a presidential commission on the status of women. In 1963, Equal Pay Act, which required the employers to pay the wages to men and women for the same work qualifications, was passed. In 1964, Title VII of the Civil Rights Act with the exception bona fide occupational qualifications (BFOQ) was accepted while the Equal Employment Opportunity Commission (EEOC) responsible to check whether the Equal Pay Act and Title VII were followed. The Title VII of the Civil Rights Act was first written to forbid employment discrimination. Initially it prohibited discrimination on the basis of race, religion and national origin. However, inclusion of the sex accepted last minute. The Title VII addresses both the disparate impact and disparate treatment. In 1965, Executive Order 11246 was passed and in 1967, it was changed to include sex, which prohibited employment discrimination by all employers with federal contracts and subcontracts. In addition, it makes sure affirmative action takes place. In 1986, sexual harassment was accepted as illegal with Supreme Court’s decision. In 1998, the largest sexual harassment settlement was negotiated with $34 million to be paid to female workers of Mitsubishi. In 2007, the United States House of Representatives banned discrimination of sexual orientation or gender identity at work.
As a result of these government policies occupational segregation decreased. The gender wage gap started to get smaller after the 1980s, most likely due to indirect feedback effects which took time, but an immediate increase in the earnings of blacks was observed in 1964. However, the laws still do not control discrimination fully in terms of hiring, promotion and training programs etc.
Executive Order 11246, which is enforced by the Office of Federal Contract Compliance, is an attempt to eliminate the gap between the advantaged and disadvantaged groups on account of gender and race. It requires contractors to observe their employment patterns. If there is under-representation of women and minorities, “goals and timetables” are created to employ more of the disadvantaged groups on account of gender and race. The pros and cons of affirmative action have been discussed. Some believe discrimination does not exist at all or even it does, prohibiting it is enough, and affirmative action is not needed. Some agree that some affirmative action is needed but they have considerations regarding the use of goals and timetables as they might be too strict. Some think strong affirmative action is needed but they are worried if there would be really sincere effort to hire the qualified individuals from the vulnerable groups.
Rodgers et al.  state minimum wage can be used as a tool to combat discrimination, as well and to promote equality. Since discrimination is embedded in the labor market and affects its functioning, and discrimination creates a basis for labor market segregation and for occupational segregation, labor markets institutions and policies can be used to reduce the inequalities. Minimum wage is one of these policies that could be used.
The minimum wage has benefits because it alters the external market wage for women, provides a mechanism for regular increases in the wages and arranges social security. It affects women in the informal sector, which is highly dominated by women partly as an outcome of discrimination, by being a reference point. However, disadvantages include: first, the wage might be very low when skills and sector aren’t taken into consideration, secondly, adjustment may take time, thirdly, enforcement may not be feasible and finally when there are public spending cuts, the real value of the wage may decline due to social security.
Others have argued that minimum wage simply shifts wage discrimination to employment discrimination. The logic is that if market wages are lower for minorities, then employers have an economic incentive to prefer hiring equally qualified minority candidates, whereas if all workers must be paid the same amount then employers will instead discriminate by not hiring minorities. Minimum wage laws could be responsible for the very high unemployment rate of black teenagers compared to white teenagers.
Laws often prohibit discrimination on the basis of 
- Race or color
- Ethnicity or national origin
- Sex or gender
- Religion or creed
- Political affiliation
- Language abilities
- Disability or medical condition
- Sexual orientation
- Gender identity
- Marital status
Many countries have laws prohibiting employment discrimination including:
- Employment discrimination law in Canada
- Employment discrimination law in the United States
- Employment discrimination law in the United Kingdom
- Employment discrimination law in the European Union
Sometimes these are part of broader anti-discrimination laws which cover housing or other issues.
During the past decade, hiring discrimination was measured by means of the golden standard to measure unequal treatment in the labour market, i.e. correspondence experiments. Within these experiments, fictitious job applications that only differ in one characteristic, are sent to real vacancies. By monitoring the subsequent call-back from employers, unequal treatment based on this characteristic can be measured and can be given a causal interpretation.
Pervasive levels of ethnic labour market discrimination are found in Belgium, Greece, Ireland, Sweden and the UK. Job candidates with foreign names are found to get 24% to 52% less job interview invitations compared to equal candidates with native names. Interestingly, ethnic discrimination is lower among the high-educated. In addition, unequal treatment is found to be heterogeneous by the labour market tightness in the occupation: compared to natives, candidates with a foreign sounding name are equally often invited to a job interview if they apply for occupations for which vacancies are difficult to fill, but they have to send twice as many applications for occupations for which labor market tightness is low. Recent research shows that ethnic discrimination is nowadays driven by employers' concern that co-workers and customers prefer collaborating with natives.
In 2014, a large correspondence experiment was conducted in Belgium. Two applications of graduates, identical except that one revealed a disability (blindness, deafness or autism), were both sent out to 768 vacancies for which the disabled candidates could be expected to be as productive as their non-disabled counterparts, based on the vacancy information. In addition, the researcher randomly disclosed the entitlement to a substantial wage subsidy in the applications of the disabled candidates. Disabled candidates had a 48% lower chance to receive a positive reaction from the employer side compared with the non-disabled candidates. Potentially due to the fear of the red tape, disclosing a wage subsidy did not affect the employment opportunities of disabled candidates.
Gender and Sexual Orientation
While overall no severe levels of discrimination based on female gender is found, unequal treatment is still measured in particular situations, for instance when candidates apply for positions at a higher functional level in Belgium, when they apply at their fertiles ages in France, and when they apply for male-dominated occupations in Austria.
Discrimination based on sexual orientation varies by country. Revealing a lesbian sexual orientation (by means of mentioning an engagement in a rainbow organisation or by mentioning one's partner name) lowers employment opportunities in Cyprus and Greece but has, overall, no negative effect in Sweden and Belgium. In the latter country, even a positive effect of revealing a lesbian sexual orientation is found for women at their fertile ages.
Pervasive levels of age discrimination are found in Belgium, England, France, Spain and Sweden. Job candidates revealing older age are found to get 39% (in Belgium) to 72% (in France) less job interview invitations compared to equal candidates revealing a younger name. Discrimination is heterogeneous by the activity older candidates undertook during their additional post-educational years. In Belgium, they are only discriminated if they have more years of inactivity or irrelevant employment.
Furthermore, European studies provide evidence for hiring discrimination based on former unemployment, trade union membership, beauty, HIV, religion, youth delinquency, former underemployment, and former depression. Employment at the army is found to have no causal effect on employment opportunities.
By means of their seminal correspondence experiment, Marianne Bertrand and Sendhil Mullainathan, showed that applications from job candidates with white-sounding names got 50 percent more callbacks for interviews than those with African-American sounding names in the United States at the start of this millennium.
In Canada, research conducted in 2010 by University of Toronto researchers Philip Oreopoulos and Diane Dechief has found that resumes featuring English-sounding names sent to Canadian employers were more than 35% more likely to receive an interview call-back as compared to resumes featuring Chinese, Indian or Greek-sounding names. The study, supported by Metropolis BC., a federally funded diversity-research agency, was conducted to investigate why recent immigrants are struggling much more in the Canadian job markets than immigrants in the 1970s. In order to test this hypothesis, dozens of identical resumes, with only the name of the applicant changed, was sent to employers in Toronto, Vancouver and Montreal. Of the three cities surveyed, Metro Vancouver employers, both large and small, were the least swayed by the ethnicity of an applicants' name. Resumes submitted to employers here were just 20% more likely to get a callback than those with Chinese or Indian names. Through interviews with Canadian employers, the researchers found that name-based discrimination on application forms were a result of time-pressed employers being concerned that individuals with foreign backgrounds would have inadequate English-language and social skills for the Canadian marketplace.
In 2006, just over one-half (51%) of persons with disabilities were employed, compared to three in four persons without disabilities.
Employment rates are lower (under 40%) for persons with developmental and communication disabilities, whereas employment rates are closer to average for persons with a hearing impairment or for those who have problems with pain, mobility, and agility.
Data from Statistics Canada's Participation and Activity Limitation Survey (PALS) show that, in 2006, one in four unemployed persons with a disability and one in eight persons with a disability who are not in the workforce believe that, in the past five years, they've been refused a job because of their disability. One in twelve employed persons with a disability also reported that they experienced discrimination, with the proportion of discrimination "increasing with the severity of activity limitations".
Gender and Sexual Orientation
According to 2011 Statistics Canada data, the gender wage gap in Ontario is 26% for full-time, full-year workers. For every $1.00 earned by a male worker, a female worker earns 74 cents. In 1987, when the Pay Equity Act was passed, the gender wage gap was 36%. It is estimated that as much as 10 to 15% of the gender wage gap is due to discrimination.
The Williams Institute, a national think tank at UCLA School of Law, released a 2011 report that has identified sexual orientation and gender identification discrimination in the workplace. According to the report, between 15% - 43% of lesbian, gay, bisexual or transgender workers have experienced either being fired, denied promotions or harassment due to their sexual orientation or gender identification.
A 2013 report was completed by the AARP to identify the impact of age discrimination in the workplace. Of those 1500 individuals who responded to AARP's 2013 Staying Ahead of the Curve survey, almost 64% of those over 45-74 said they have seen or have experienced age discrimination in the workplace. Of those, 92% say it was somewhat or very common in their workplace.
- Official University of Toronto faculty profile page for Philip Oreopoulos which includes a CV as well as other research he has completed
- Official University of Toronto faculty profile page for Diane Dechief which includes a CV as well as other research she has completed
- Equal Remuneration Convention, 1951
- Discrimination (Employment and Occupation) Convention, 1958
- Economic discrimination
- Labour and employment law
- Marriage bars
- Occupational segregation
Notes and references
- Blau, Francine D.; Ferber, Marianne A.; Winkler, Anne E. (2010). "Differences in Occupations and Earnings: The Role of Labor Market Discrimination". The Economics of Women, Men, and Work (6th international ed.). Harlow: Pearson Education. ISBN 978-0-1370-2436-0.
- Darity, William; Mason, Patrick (1998). "Evidence on Discrimination in Employment: Codes of Color, Codes of Gender". Journal of Economic Perspectives. 12 (2): 63–90. JSTOR 2646962. doi:10.1257/jep.12.2.63.
- Figart, Deborah (1997). "Gender as More than a Dummy Variable: Feminist Approaches to Discrimination". Review of Social Economy. 55 (1): 1–32. doi:10.1080/00346769700000022.
- Elson, Diane (1999). "Labor markets as gendered institutions: equality, efficiency and empowerment issues". World Development. 27 (3): 611–627. doi:10.1016/S0305-750X(98)00147-8.
- Sundstrom, William A. (1994). "The Color Line: Racial Norms and Discrimination in Urban Labor Markets, 1910–1950". Journal of Economic History. 54 (2): 382–396. doi:10.1017/S0022050700014534.
- Noonen, Mary C.; Corcoran, Mary E.; Courant, Paul (2005). "Pay Differences Among the Highly Trained: Cohort Differences in the Sex Gap in Lawyers’ Earnings". Social Forces. 84 (2): 853–872. doi:10.1353/sof.2006.0021.
- Weinberger, Catherine J. (1998). "Race and Gender Wage Gaps in the Market for Recent College Graduates". Industrial Relations. 37 (1): 67–84. doi:10.1111/0019-8676.721998035.
- Black, Dan A.; Haviland, Amelia M.; Sanders, Seth G.; Taylor, Lowell J. (2008). "Gender Wage Disparities Among the Highly Educated". Journal of Human Resources. 43 (3): 630–659. doi:10.3368/jhr.43.3.630.
- Goldin, Claude; Katz, Lawrence F. (2008). "Transitions: Career and Family Life Cycles of the Educational Elite". American Economic Review. 98 (2): 363–369. JSTOR 29730048. doi:10.1257/aer.98.2.363.
- Chase, Max (5 February 2013). "Female CFOs May Be Best Remedy Against Discrimination". CFO Insight.
- Fix, Michael; Galster, George C.; Struck, Raymond J. (1993). "An Overview of Auditing for Discrimination". In Fix, Michael; Struyk, Raymond. Clear and Convincing Evidence: Measurement of Discrimination in America. Washington, DC: Urban Institute Press. pp. 1–68. ISBN 0-87766-599-0.
- Bendick, Marc Jr.; Jackson, Charles W.; Reinoso, Victor A. (1994). "Measuring Employment Discrimination through Controlled Experiments". Review of Black Political Economy. 23 (1): 25–48. doi:10.1007/BF02895739.
- Neumark, David; Blank, Roy J.; Van Nort, Kyle D. (1996). "Sex Discrimination in Restaurant Hiring: An Audit Study". Quarterly Journal of Economics. 111 (3): 915–942. doi:10.2307/2946676.
- Rouse, Cecilia; Goldin, Claude (2000). "Orchestrating Impartiality: The Impact of ‘Blind’ Auditions on Female Musicians". American Economic Review. 90 (4): 715–741. doi:10.1257/aer.90.4.715.
- Riach, Peter B.; Rich, Judith (1991–92). "Measuring Discrimination By Direct Experimental Methods Seeking Gunsmoke". Journal of Post Keynesian Economics. 14 (2): 143–150. JSTOR 4538285.
- Arce, Carlos H.; Murguia, Eduard; Frisbie, W. Parker (1987). "Phenotype and Life Chances Among Chicanos". Hispanic Journal of Behavioral Studies. 9 (1): 19–33. doi:10.1177/073998638703090102.
- Murphy, Robert P. 2010. The Economics of Discrimination, Library of Economics.
- Discrimination, The Concise Encyclopedia of Economics, Library of Economics.
- Becker, Gary S. (1971). The Economics of Discrimination (2nd ed.). Chicago: University of Chicago Press. ISBN 0-226-04115-8.
- Phelps, Edmund S. (1972). "The Statistical Theory of Racism and Sexism". American Economic Review. 62 (4): 659–661. JSTOR 1806107.
- Bergman, Barbara R. (1974). "Occupational Segregation, Wages and Profits When Employers Discriminate by Race or Sex". Eastern Economic Journal. 1 (2): 103–110. JSTOR 40315472.
- Pasternak, M. (2011). "Employment Discrimination: Some Economic Definitions, Critique and Legal Implications" (PDF). N. C. Cent. L. Rev. 33 (2): 163–175.
- Piore, Michael J. (1971). "The Dual Labor Market: Theory and Implications". In Gordon, David M. Problems in Political Economy: an Urban Perspective. Lexington: Heath.
- Doeringer, Peter B.; Piore, Micheal J. (1971). Internal Labor Markets and Manpower Analysis. Lexington: Heath.
- Alesina, A.; Giuliano, P.; Nunn, N. (2013). "On the Origins of Gender Roles: Women and the Plough". Quarterly Journal of Economics. 128 (2): 469–530. doi:10.1093/qje/qjt005.
- Rodgers, Janine; Rubery, Jill (2003). "The Minimum Wage as a Tool to Combat Discrimination and Promote Equality". International Labour Review. 142 (4): 543–556. doi:10.1111/j.1564-913X.2003.tb00543.x.
- Neal, Derek A.; Johnson, William R. (1996). "The Role of Premarket Factors in Black-White Wage Differences". Journal of Political Economy. 104 (5): 869–895. JSTOR 2138945. doi:10.1086/262045.
- Kossoudji, Sherrie A.; Dresser, Laura (1992). "Working Class Rosies: Women Industrial Workers During World War II". Journal of Economic History. 52 (2): 431–446. doi:10.1017/S0022050700010846.
- Tobias, Sheila; Anderson, Lisa (1974). "What Really Happened to Rosie the Riveter? Demobilization and the Female Labor Force, 1944–47". MSS Modular Publications.
- Carr, Marilyn; Chen, Martha Alter (2002). "Globalization and the Informal Economy: How Globe Trade and Investment Impact on the Working Poor?". ILO working paper.
- OECD. 2009. “Is Informal Normal? Towards More and Better Jobs in Developing Countries” Development Centre Studies.
- Sowell, T. (1977). Minimum Wage Escalation. Stanford: Hoover Institution Press.
- Protected areas and grounds under the Human Rights, Citizenship and Multiculturalism Act; Discrimination by Type; Types of discrimination
- "Workplace Retaliation: What Are Your Rights?" Nolo accessed March 12, 2015 "according to the U.S. Supreme Court, you must consider the circumstances of the situation."
- Pager, D. (2007) The use of field experiments for studies of employment discrimination: contributions, critiques, and directions for the future.
- Rich, J. (2014) What Do Field Experiments of Discrimination in Markets Tell Us? A Meta Analysis of Studies Conducted since 2000 IZA Discussion Paper Series, 8584.
- Baert, S., Cockx, B., Gheyle, N., Vandamme, C. (2015) Is There Less Discrimination in Occupations Where Recruitment is Difficult? Industrial and Labor Relations Review, 68, 467-500.
- Drydakis, N., Vlassis, M. (2010) Ethnic discrimination in the Greek labour market: occupational access, insurance coverage and wage offers. Manchester School, 78, 201–218.
- McGinnity, F., Lunn, P. D. (2011) Measuring discrimination facing ethnic minority job applicants: an Irish experiment. Work, Employment and Society, 25, 693–708.
- Bursell, M. (2007) What’s in a name? A field experiment test for the existence of ethnic discrimination in the hiring process. Stockholm University Linnaeus Center for Integration Studies Working Paper Series, 2007–7.
- Wood, M., Hales, J., Purdon, S., Sejersen, T., Hayllar, O. (2009) A test for racial discrimination in recruitment practice in British cities. DWP Research Reports, 607.
- Baert, S., De Pauw, A.-S. (2014) Is Ethnic Discrimination due to Distaste or Statistics? Economics Letters, 125, 270–273.
- Baert, S. (Forthcoming) Wage Subsidies and Hiring Chances for the Disabled: Some Causal Evidence. European Journal of Health Economics.
- Baert, S., De Pauw, A.-S., Deschacht, N. (Forthcoming) [Do Employer Preferences Contribute to Sticky Floors?] Industrial & Labor Relations Review.
- Petit, P. (2007) The effects of age and family constraints on gender hiring discrimination: A field experiment in the French financial sector. Labour Economics, 14, 371-391.
- Weichselbaumer, D. (2004) Is it sex or personality? The impact of sex stereotypes on discrimination in applicant selection. Eastern Economic Journal, 30, 159-186.
- Drydakis, N. (2011) Women’s Sexual Orientation and Labor Market Outcomes in Greece. Feminist Economics, 17, 89-117.
- Drydakis, N. (2014) Sexual Orientation Discrimination in the Cypriot Labour Market: Distastes or Uncertainty? International Journal of Manpower, 35, 720-744.
- Ahmed, A. M., Andersson, L., Hammarstedt, M. (2011) Are gays and lesbians discriminated against in the hiring situation? Institute for Labour Market Policy Evaluation Working Paper Series 21.
- Baert, S. (2014) Career Lesbians. Getting Hired for Not Having Kids? Industrial Relations, 45, 543-561.
- Baert, S., Norga, J., Thuy, Y., Van Hecke, M. (2015) Getting Grey Hairs in the Labour Market: An Alternative Experiment on Age Discrimination IZA Discussion Paper Series, 9289.
- Riach, P. A., Rich, J. (2006) An Experimental Investigation of Age Discrimination in the French Labour Market. IZA Discussion Paper Series, 2522.
- Riach, P. A., Rich, J. (2010) An Experimental Investigation of Age Discrimination in the English Labor Market. Annals of Economics and Statistics, 99/100, 169–185.
- Tinsley, M. (2012) Too much to lose: Understanding and supporting Britain’s older workers. London: Policy Exchange.
- Albert, A., Escot, L., Fernández-Cornejo, J. A. (2011) A field experiment to study sex and age discrimination in the Madrid labour market. International Journal of Human Resource Management, 22, 351–375.
- Riach, P. A., Rich, J. (2007) An Experimental Investigation of Age Discrimination in the Spanish Labour Market. IZA Discussion Paper Series, 2654.
- Ahmed, A. M., Andersson, L., Hammarstedt, M. (2012) Does age matter for employability? A field experiment on ageism in the Swedish labour market. Applied Economics Letters, 19, 403–406.
- Eriksson, S., Rooth, D.-O. (2014) Do Employers Use Unemployment as a Sorting Criterion When Hiring? Evidence from a Field Experiment. American Economic Review, 104, 1014-1039.
- Baert, S., Verhaest, D. (2014) Unemployment or Overeducation: Which is a Worse Signal to Employers? IZA Discussion Papers, 8312.
- Baert, S., Omey, E. (2015) Hiring Discrimination against Pro-Union Applicants: The Role of Union Density and Firm Size. De Economist, 163, 263-280.
- Rooth, D.-O. (2009) Obesity, Attractiveness, and Differential Treatment in Hiring: A Field Experiment. Journal of Human Resources, 44, 710-735.
- Drydakis, N. (2010) Labour Discrimination as a Symptom of HIV: Experimental Evaluation the Greek Case. Journal of Industrial Relations, 52, 201-217.
- Drydakis Nick (2010) Religious Affiliation and Labour Bias. Journal for the Scientific Study of Religion, 49, 472-488.
- Baert, S., Verhofstadt, E. (2015) Labour market discrimination against former juvenile delinquents: evidence from a field experiment. Applied Economics, 47, 1061-1072.
- Baert, S., De Visschere, S, Omey, E., Schoors, K. (2014) First Depressed, Then Discriminated Against? IZA Discussion Papers, 8320.
- Baert, S., Balcaen, P. (2013) The Impact of Military Work Experience on Later Hiring Chances in the Civilian Labour Market. Evidence from a Field Experiment. Economics: The Open-Access, Open-Assessment E-Journal, 7, 2013-37.
- Bertrand, M., Mullainathan, S. (2004) Are Emily and Greg More Employable Than Lakisha and Jamal? A Field Experiment on Labor Market Discrimination American Economic Review, 94, 991-1013
- "Why do some employers prefer to interview Matthew, but not Samir? New evidence from Toronto, Montreal, and Vancouver" (PDF). Metropolis British Columbia. Retrieved 21 November 2014.
- "The 2006 Participation and Activity Limitation Survey: Disability in Canada (89-628-X)". Statistics Canada. Statistics Canada. 29 January 2010. Retrieved 17 December 2014.
- "Toward Inclusion of People with Disabilities in the Workplace" (PDF). December 2008. Retrieved 17 December 2014.
- "2011 National Household Survey: Data tables". Statistics Canada. Retrieved 17 December 2014.
- "Gender Wage Gap". Pay Equity Commission of Ontario. Retrieved 17 December 2014.
- "Documented Evidence of Employment Discrimination & Its Effects on LGBT People" (PDF). The Williams Institute. Retrieved 25 November 2014.
- "Staying Ahead of the Curve 2013: AARP Multicultural Work and Career Study Perceptions of Age Discrimination in the Workplace – Ages 45-74" (PDF). AARP. p. 1. Retrieved 25 November 2014.
- Pager, Devah (2009). Marked: Race, Crime, and Finding Work in an Era of Mass Incarceration. University of Chicago Press. ISBN 978-0-226-64484-4.
- Papa, Michael J.; Tom D. Daniels; Barry K. Spiker (2007). Organizational Communication: Perspectives and Trends (5 ed.). SAGE. ISBN 1-4129-1684-4.
- Trentham, Susan; Laurie Larwood (1998). "Gender Discrimination and the Workplace: An Examination of Rational Bias Theory". Sex Roles. 38 (112): 1–28. doi:10.1023/A:1018782226876.
- Leila Schneps and Coralie Colmez, Math on trial. How numbers get used and abused in the courtroom, Basic Books, 2013. ISBN 978-0-465-03292-1. (Sixth chapter: "Math error number 6: Simpson's paradox. The Berkeley sex bias case: discrimination detection").
- Wadhwa, Vivek (6 June 2006). "The True Cost of Discrimination". BusinessWeek Online. Retrieved 29 August 2009.
- Muhs, Gabriella Gutiérrez y; Harris, Angela P.; Flores Niemann, Yolanda; González, Carmen G. (2012). Presumed incompetent: the intersections of race and class for women in academia. Boulder, Colorado: University Press of Colorado. ISBN 9780874219227.