The Effects of Gender Integration on Men: Evidence from the U.S. Military

Greenberg, Wasserman, and Weber (2024/2026) ask whether men negatively respond—in terms of job performance, behavior, and workplace perceptions—when women first enter an exclusively male occupation. They exploit the staggered 2017-onward integration of women into U.S. Army infantry and armor combat companies following the 2016 rescission of the Ground Combat Exclusion Policy. The setting offers unusually clean causal identification: integration timing within Brigade Combat Teams was neither systematic nor data-driven, the Army’s rigid pay scales meant integration posed no displacement or wage threat to incumbent men, and roughly 391 companies are observed over 2012–2020. The empirical strategy is a staggered difference-in-differences design with company fixed effects, BCT-by-year-of-arrival fixed effects, and month-of-year fixed effects, applied to an individual-level sample of newly arrived male soldiers. Outcomes come from monthly administrative personnel records (retention, misconduct separations, demotions, criminal investigations, drug tests, medical profiles, physical fitness scores) and the Defense Organizational Climate Survey (DEOCS), a congressionally mandated annual survey with response rates above 50% covering organizational effectiveness, equal opportunity, and sexual assault prevention and response. The main finding is that integrating women into previously all-male combat companies does not negatively affect men’s performance or behavioral outcomes. Estimates are precise enough to rule out small detrimental effects: two years post-integration, the authors can rule out a 3% increase in attrition, a 5% increase in demotions, and a 4% increase in criminal investigations relative to their respective means. One behavioral outcome shows a statistically significant improvement: integration reduces separations for misconduct by 1.3 percentage points (16% of the mean). Drug test positivity also declines. The sole potential negative administrative finding is a 1.8-point decline in physical fitness scores (0.7% of the mean, roughly 5% of a standard deviation), but this does not affect pass rates and becomes statistically insignificant when scores are imputed using observable covariates. An aggregate Performance and Behavior Index rules out reductions of 0.8% of a standard deviation; the No Adverse Outcomes measure rules out a 1.2 percentage point increase (3% of the mean). Despite these null-to-positive performance effects, survey data reveal that integration causes a 5% of a standard deviation decline in men’s overall perceptions of workplace quality. This perception decline is concentrated in companies that received a female officer shortly after integration. Among companies integrated only with female enlisted soldiers (no female officer), men’s workplace attitudes actually improve by 14.7% of a standard deviation. Two mechanisms are examined: increased male awareness of pre-existing workplace problems (supported by higher reported observations of bullying, hazing, and unwanted comments, especially among male officers in female-officer-integrated companies), and negative reactions to women in positions of authority (supported by broader declines in organizational effectiveness perceptions not confined to equal-opportunity items). Crucially, the perception decline does not translate into retaliatory behavior or performance deterioration; companies integrated with a female officer show some performance gains, and female enlisted soldiers in those companies report fewer workplace problems. Scope conditions: findings apply to a high-stakes, traditionally male-dominated, hierarchical occupational setting during 2017–2020, a period when U.S. deployment missions were primarily advise-and-assist rather than direct combat. Integration increased female representation by approximately 4.7 percentage points on average.

Kyle Greenberg | Macro Paper Warehouse

The Effects of Gender Integration on Men: Evidence from the U.S. Military