2Why is there wage dispersion? Different jobs (compensating wage differentials)DiscriminationDifferent characteristics of workers:AbilityRSchoolingChoices about work and leisure
3What is discrimination? When workers earn different amounts even if they do the same job and have the same ability.Borjas: “where the costs and benefits of an economic exchange depend on the race and/or gender of the person involved in the exchange.”
4Table 9-1: various measures of human capital and labor market outcomes in the US labor market. WhiteBlackHispanicMaleFemale% HS grad or more85.387.181.982.558.262.5% bachelor’s degree or more29.928.318.019.011.813.7LFPR76.360.171.264.084.758.8Unemployment Rate188.8.131.52.74.65.5Annual Earnings (in $1,000)55.935.139.531.835.426.3Annual earnings (among workers employed full-time, year-round) (in $1,000)65.843.644.537.638.832.1
5What is interesting about table 9-1? Difference in earning are due in part to differences in labor supply: white man 59% more than white woman but if we compare only those who work full time the gap is 51%Differences in earnings are due in part to differences in educational attaiment: 15% of white men do not have a HS diploma, 20% of black men and > 40% of hispanic men.Look at college diplomas.If rate of return to schooling is between 7 and 9%, this could generate substantial wage differentials
6Table 9-2: international differences in Female/Male Wage ratios CountryAustralia0.8000.868Canada0.6330.698Finland0.7340.799France0.899Germany0.7170.755Ireland0.745Italy0.833Japan0.5870.636New Zealand0.814Spain0.711Sweden0.8380.835United Kingdom0.6260.749United States0.6250.763
7DiscriminationSo, the truth is, we can’t explain all of the differences in wages between men and women and across races.So, maybe there is discrimination in the labor market.There are several models of discrimination and ways to measure it. That’s what this chapter is about.
8Models of discrimination The perfectly competitive marketGary Becker’s theory of discriminationStatistical discriminationCore and Periphery jobs
9Neoclassical Model of Discrimination If a market is perfectly competitive, discrimination cannot exist for long.
10Problem There is evidence of discrimination. Explore the EEOC webpage sometime.Hundreds of legal cases.Hundreds of stories:The movie “North Country”Wal Mart
11Gary Becker’s Taste for Discrimination So, Becker wants to explain why we might see discrimination in a market, even if it is a competitive one.He comes up with the notion of a “taste for discrimination” among:EmployersEmployeesCustomers
12Taste for Discrimination Suppose there are two types of workers in the labor market: white workers and black workers.A competitive employer faces constant prices for these inputs:Ww = wage rate for white workersWb = wage rate for black workersIf the employer is prejudiced against blacks, the employer gets a disutility from hiring black workers.Employer will ACT as though the cost of a black worker is:Wb(1+d) dollars.d is the “discrimination coefficient”
13Example Suppose that Wb = $10 per hour d = 0.5 The employer will then act as if hiring a black worker costs $15 per hour, a 50% increase in the cost.The greater the prejudice, the greater the disutility from hiring blacks and the greater the discrimination coefficient.
14NepotismSome employers (maybe black-owned firms) might have a different type of prejudice: they PREFER to hire blacksThink OprahThis type of behavior is called nepotismIt implies that an employer’s utility-adjusted cost of hiring a favored worker equals Wb(1-n) dollarsThey will act as if hiring a black worker is actually cheaper than it really is.
15Employer Discrimination Assume black and white workers are perfect substitutes, so a firm’s production function looks like this:q = f(Ew + Eb)The firm needs to decide which combination of inputs to hire. Ew is number of white workers hired and Eb is number of black workers hired. The firm’s output just depends on the total number of workers hired. Not their race.Any differences that arise in the economic status of the two groups cannot be attributed to skill differencences.
16Assume first: No Prejudice Both black and white workers have same VMPWw = wage of white worker and Wb = wage of black workerProfit maximization? Hire the cheapest worker.If Wb < Ww, hire black workers until Wb = VMPeSee figure 9-1.
17Assume Prejudicial Firm Employer acts as if the black wage is not Wb but is Wb(1+d).Now firm hires the worker with the lowest utility-adjusted price.Decision rule:Hire only black workers if Wb(1+d) < WwHire only white workers if Wb(1+d) > WwBig Implication: Segregated Workforce even under competitive conditions!Note: empirical study of racial composition of a firm’s workforce (Carrington and Troske, 1998): little evidence that blacks and whites tend to be employed by different firms.
18Consequences of Employer Discrimination See Figure 9-2.“white firms” pay more and hire less“black firms” who are still discriminatory, hire fewer black workers depending on size of d
19Labor Market Equilibrium See figure 9-4Initially assume Wb > Ww: no firm will hire black workersWb falls.Note: even where Wb = Ww demand is zero. Why?R is a “threshold” where some firms have a low enough d to begin to hire black workers.Note that the equilibrium black-white wage ratio (Wb/Ww)* occurs BELOW the point where the black white wage ratio = 1. Employer discrimination generates a gap between equally skilled black and white workers.
20Employee Discrimination Suppose that whites dislike working alongside blacks and blacks are indifferent about the race of their coworkers.These white workers will act as if their wage (Ww) is only Ww(1- d) where d is the white worker’s discrimination coefficient.Example: Ww = $15/hour. In a discriminating worker’s view, an integrated firm’s wage is less than $15/hour so that firm will have to pay more to get white workers to work there.But it does not pay to do this if you are a color-blind firm… Thus this model implies a segregated workforce as well.Note however, that a race wage gap is NOT generated by this behavior.Why? Explain.
21Customer Discrimination If customers have a taste for discrimination, their purchasing decisions are not based on the actual price of a good, p, but on the utility-adjusted price or p(1+d), where d is the discrimination coefficient.If whites dislike purchasing from black sellers, customer discrimination reduces the demand for goods and services sold by minorities.Can you think of a case in which you have “customer discrimination”?
22Customer Discrimination and the wage gap Adverse effect on black wages when the firm cannot easily hide its black workers from public view.A firm employing a black worker in a sales position will have to lower the price of the product so as to compensate white buyers for their disutility.The wage of black workers will then fall because black workers have to compensate the employer for the loss in profits.
23Empirical StudyRecent survey tried to get at how the interaction between the customers’ racial background and the extent of the contact between workers and customers alters the hiring decisions of firms.Table 9.3: 58% of newly hired workers are black in contact firms where most customers are black.9% of newly hired workers are black in contact firms where most customers are white.Difference between the two suggests that customer discrimination reduces the fraction of blacks among newly hired workers by 49.0 percentage points.
24Need to compare to a control group Important to note that the black employment gap between these two types of firms may be attributable to other factors. What if contact firms with mainly black customers are in black parts of a city… they’d be more likely to hire black workers.Firms in survey where workers don’t have much contact can serve as a control group.Fraction of newly hired workers who are black falls from percent to 12.2 percent as the customer base shifts from black to white. … this is a 34.4 percentage point difference.Because we can’t blame this on customers, this is what we’d expect to happen even if we didn’t have customer discrimination.
25Diff in Diff Example Over ½ of Firm’s Customers are Black Over 75% of Firm’s Customers are WhiteDifferenceType of FirmContact between customers and workers58.0%9.0%49.0%No contact between customers and workers46.6%12.2%34.4%Difference-in-differences--14.6
26Model 3: Statistical Discrimination Racial and gender differences can arise in perfectly competitive situations even in the absence of prejudice when membership in a particular group carries information about a person’s skills and productivity.Job searches are expensive, employers use all info available to them. Statistical averages are part of that.Example: statistical averages about women and maternity leaves etc.Illegal to apply this information unless it is a BFOQ
27Experimental Evidence on Discrimination Hiring audits:Experiments are cleverly designed to induce employers to reveal preferences about hiring women and minorities.Sent out about 5,000 fake resumes in response to about 1,300 job ads that actually appeared in Boston and Chicago newspapers.Included black sounding and white sounding namesHolding skills in the resume constant, the applicants with white-sounding names got about 1 callback for every 10 resumes sent whereas the black-sounding names got 1 callback for every 15 resumes sent.
28Measuring Discrimination ∆W = Wm – Wfwhere W indicates the averageThis definition is not great because it compares apples to oranges.There are many factors, other than discrimination that generate wage differentials between groups. Number of hours worked in the workplace, for example is one simple measure.Other factors in the gender wage gap?
29Better measureWe would like to adjust the “raw” wage differential given above for differences in skills (and even choices to the extent that we can measure them) between men and women.Do this by estimating regressions that relate the earnings of men or women to a wide array of socioeconomic and skill characteristics:Male earnings function: Wm = αm + βmSmFemale earnings function: Wf = αf + βfSfα tells us how much an employer values men/women with 0 years of schoolingβ tells us by how much a man’s or woman’s wage increases if he/she gets one more year of schoolingIf employers value the education acquired by men and women equally, the coefficients should be equal
31Oaxaca DecompositionWhat we would like to do is be able to tell how much of the differences in wages is due to differences in skills between men and women and the portion of the “wage gap” that is due to discrimination.We can “decompose” the above equation into two parts (using a little algebra and a little trick –add and subtract the term βm x Sf):∆W = (αm – αf) + (βm – βf)Sf + βm(Sm – Sf)
32What does that mean??? ∆W = (αm – αf) + (βm – βf)Sf + βm(Sm – Sf) (αm – αf) + (βm – βf)Sf : portion due to discriminationthis term will be positive if either employers value a man’s schooling more than they value a woman’s schooling (βm – βf), or if employers just pay men more than women for any level of schooling (αm – αf)βm(Sm – Sf): portion due to differences in skillsthis term is zero of men and women have the same average schooling.See figure 9-6
33Validity of OaxacaDepends largely on whether we have controlled for ALL of the dimensions in which the skills of the two groups differ…Wage equations tend to get to be like the “kitchen sink” and even then we have unknowns…What CAN we control for?Schooling, years of labor market experience, sex, race, region, union status, occupation, industry, hours worked…? Number of children? Age of first birth? Marital status.WHAT CAN’T we control for?Effort. Motivation. Quality of schooling. Major?
34Section 9-11: Determinants of the Female-Male Wage Ratio Controls for Differences in Education, Age, Sex and Region of ResidenceControls for Differences in Education, Age, Sex, Region of Residence, and Occupation and IndustryRaw log wage differential-0.286Due to difference in skills-0.008-0.076Due to discrimination-0.279-0.211
35Table 9-6 Women earned about 28.6 percent less than men in 1995 Difference in education, age, and region of residence generate only a trivial wage gap between men and women, about 0.8 percentEven after adjusting for occupation and industry, differences in observable socioeconomic characteristics between the two groups generate only a 7.6 percent wage gap.What is this Oaxaca decomposition missing? Labor market experience. Women tend to have kids and drop out of the labor market. By the late 1980s, the typical woman worked only 71 percent of her potential years whereas men worked 93 percent.
36Labor market attachment If drop out of labor market, lower payoff to human capital investmentLower gain in wages due to experienceHuman capital depreciationStudy of University of Michigan law school classes of 1973 andFifteen years after graduation, male attorneys earned $141,000 annually as compared to $86,000 for female attorneys.2/3 of this wage gap is due to differences in work histories.If a female attorney worked part-time for 3 years her earnings were reduced by 17% over her lifetime.
37Which came first? And what should we do? Low wages due to less LM attachment orLess LM attachment due to low wages?Are family friendly policies the answer? Are they politically feasible?
38Last Discrimination Model: Bergman’s Occupational Crowding Occupational SegregationBlue tribe v. Red tribe and the hunt for berries
39Economics of Specialization Becker – household economics.Specialize in what you’re good at, then trade.If women earn less, they should work at home while men work for a wage in the market.
40Conclusion and the Extra Hour Assignment One of my papersOne of John’s papersOne of our coauthored papersChoose one, read it, discuss it.