Labor Economics Expert Witness

Overview

About Labor Economics Expert Witnesses

A labor economist answers whether a pattern in a workforce can be explained by something other than the claim in the suit. Who was hired, promoted, paid or let go, compared with whom, and after accounting for what? The work rests on payroll and HR records, plus government data on the outside labor market. This page covers workforce analysis in employment disputes. Lost earnings for one injured person belong to a forensic economist, and a vocational expert addresses what that person can still do.

Comparing With the Right Group

The first choice usually decides the case. In Hazelwood School District v. United States, the Supreme Court addressed a comparison of a district's teaching staff with its pupils, when the better measure was the qualified population in the relevant labor market ¹. The Court remanded for further findings on the relevant labor market area ¹. It also repeated the idea that a difference greater than two or three standard deviations would make a hypothesis of neutral hiring suspect ¹. In Teamsters v. United States, the Court said statistics showing imbalance are probative because imbalance is often a telltale sign of purposeful discrimination, absent explanation ².

So the economist asks who was really available and qualified, in what geography, in what period. Two sides can reach opposite answers from the same payroll file by defining that pool differently.

Government data helps define the market. The Current Population Survey is a monthly survey of U.S. households conducted by the Census Bureau for the Bureau of Labor Statistics ³. The Occupational Employment and Wage Statistics program produces employment and wage estimates annually for over 800 occupations, at national, state and metropolitan levels ⁴. Each has limits: survey categories may not match the job in dispute, and an expert should say how they were mapped.

Pay Analysis

Pay cases usually use regression, comparing pay after controlling for legitimate factors such as job, tenure and performance. The fight is over which factors are legitimate. Under the Equal Pay Act, an employer may not pay employees of one sex less than the opposite sex for equal work on jobs requiring equal skill, effort and responsibility in the same establishment ⁵. Choosing to control for a factor the employer itself may have tainted, such as a performance rating or a job grade, can hide the very effect being tested. Grouping employees who do not do equal work creates the opposite problem. Each side's expert should show results with and without the disputed variables.

Disparate Impact: A Changing Field

The statute is stable, but the agency position has moved sharply, so any expert must address the date and forum.

Title VII says a disparate impact violation is established if a party shows that a particular employment practice causes a disparate impact and the respondent fails to show the practice is job related and consistent with business necessity ⁶. The Uniform Guidelines, still in the Code of Federal Regulations, state that a selection rate less than four-fifths of the rate for the group with the highest rate will generally be regarded by federal enforcement agencies as evidence of adverse impact ⁷.

In June 2026, however, the Justice Department's Office of Legal Counsel issued an opinion to the EEOC Chair concluding that the EEOC's Title VII guidelines are unconstitutional because they contemplate liability based on disparate effects alone ⁸. It also said plaintiffs must establish that the practice specifically caused the disparate impact ⁸. OPM then removed references to the Guidelines from federal personnel regulations, effective July 31, 2026 ⁹. Courts decide what Title VII means, so an opinion of this kind does not itself change a court's reading of the statute. But an expert report that leans on the four-fifths rule alone is now exposed, and tests of statistical significance and causation should be set out separately. Counsel should confirm the current status of the Guidelines and any later cases before relying on them.

Data availability may also change. In 2026 the EEOC proposed to rescind the EEO-1 and related reports and their recordkeeping requirements ¹⁰. An expert should confirm what the employer actually kept.

Wage and Hour Class Damages

FLSA collective actions often need labor economists too, usually to estimate unpaid time from samples and timekeeping data. An employer who violates the minimum wage or overtime rules is liable for the unpaid wages and an additional equal amount as liquidated damages ¹¹. Sampling is often central, and the limits on representative evidence that apply in class actions apply here as well.

Who Is Qualified, and Who Does What

No license applies. Look for a doctorate in economics or a closely related field, with a focus on labor, and hands-on experience with payroll and HRIS data. Ask how the expert defined the comparison group and how the results change under other reasonable choices. A statistician can check the model. A forensic economist addresses individual loss. An HR practices expert addresses whether a policy was followed, and a compensation consultant may explain how a pay system was designed.

Qualifications

Qualifications to Look For

• ✓Doctorate in economics or a closely related field, with a focus on labor
• ✓Hands-on experience with payroll, HRIS, and applicant tracking data
• ✓Regression and statistical testing skills that hold up in deposition
• ✓Experience using Current Population Survey and OEWS data
• ✓Knowledge of Title VII and Equal Pay Act proof structures, and recent agency changes
• ✓Ability to show sensitivity of results to reasonable alternative choices
• ✓Prior deposition and trial testimony in employment class or pattern cases

FAQ

Frequently Asked Questions