The Effects of Gender Integration on Men

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.

Q: What was the policy change studied and why does it offer causal leverage? A: In December 2015, Secretary of Defense Ashton Carter announced that all U.S. military occupations, including infantry and armor combat roles, would open to women starting in 2016. Women did not begin arriving at operational companies until 2017 due to training timelines. Within BCTs, the selection of which companies to integrate was neither systematic nor data-driven, and baseline characteristics of integrated and non-integrated companies are similar after conditioning on BCT and company-type fixed effects, supporting a parallel trends assumption.

Q: What are the main administrative performance findings? A: Integration has a positive but statistically insignificant effect on retention, and reduces misconduct separations by 1.3 percentage points (significant at the 5% level), representing a 16% reduction relative to the mean. Demotions, criminal investigations (including sex-related and domestic violence), and medical profiles show no significant negative effects, with precision sufficient to rule out 5% increases in demotions and 4% increases in criminal investigations. Physical fitness scores decline by 1.8 points (0.7% of mean, approximately 5% of a standard deviation), but pass rates are unaffected and the estimate becomes insignificant when scores are imputed with observable covariates.

Q: What does the aggregate performance index show? A: The Performance and Behavior Index—an equally weighted z-score average of retention, misconduct separations, demotions, criminal investigations, medical profiles, promotions to Sergeant, and physical fitness outcomes—shows a positive but insignificant effect of integration, ruling 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 incidence of adverse outcomes).

Q: How do men’s workplace perceptions change after integration? A: The overall workplace quality index constructed from all DEOCS Likert-scale items declines by 5% of a standard deviation following integration, spanning perceptions of organizational effectiveness, workplace inclusivity, and sexual assault prevention and response. This average effect masks critical heterogeneity by the rank composition of integrating women.

Q: What is the key heterogeneity in survey responses? A: The decline in men’s perceptions is entirely driven by companies that received a female officer shortly after integration. In companies integrated only with female enlisted soldiers (17% of integrating companies did not receive a female officer within a month), men’s perceptions improve by 14.7% of a standard deviation. Male officers show a larger negative shift than male enlisted soldiers in officer-integrated companies, and this difference is statistically significant.

Q: What mechanisms explain the negative perception response to female officers? A: Two mechanisms are investigated. First, increased awareness: male soldiers—especially male officers—report observing more bullying, hazing, and unwanted comments after a female officer is integrated but not after integration with only female enlisted, and the decline in perceptions of sexual assault prevention and response is significantly larger among male officers than enlisted men, consistent with shared leadership roles amplifying awareness of workplace problems. Second, negative reactions to female authority: declines in perceptions are more pronounced on organizational effectiveness questions than on equal-opportunity items and extend to issues unrelated to women, suggesting broader dissatisfaction with female leadership alongside heightened awareness.

Q: Is the decline in perceptions related to actual differences in female officer qualifications or preferential treatment? A: No. Female and male officers have similar baseline characteristics including educational background and experience. Companies integrated with female officers perform at least as well as non-integrated companies or those integrated only with enlisted women on administrative metrics. There is no evidence that male officers waited longer for leadership assignments relative to female colleagues, ruling out perceived preferential treatment as a driver.

Q: Do men’s negative perceptions of female officers translate into retaliatory behavior toward women? A: No. Administrative misconduct metrics show some improvements in male behavior when a female officer is present. Female enlisted soldiers in female-officer-integrated companies report fewer workplace problems on the climate survey than female enlisted soldiers in companies integrated without a female officer, indicating that the presence of a female officer generates benefits for female enlisted soldiers rather than backlash against them.

Q: Does heterogeneity by integration intensity or women’s rank affect administrative outcomes for men? A: Integration intensity (number of women initially integrated) and rank composition (female officers vs. only female enlisted) do not produce negative administrative outcomes in any subgroup. The aggregate Performance and Behavior Index shows a positive effect when a female officer is included. Effects also do not vary with male soldiers’ rank (enlisted vs. officer) or their tenure in the company.

Q: What happens in units that deploy to combat zones? A: Approximately one in five integrated companies deployed to a combat zone within two years of integration. Integration does not negatively affect retention, behavior, or performance of men in deploying units. Declines in workplace perceptions are larger for deploying units and are most pronounced when integration occurs shortly after return from deployment, consistent with deployment strengthening in-group identity among male soldiers rather than women performing poorly during combat-zone service.

Q: What do the findings imply for theories of identity economics and the pollution theory of discrimination? A: The null-to-positive behavioral and performance responses to women’s entry contradict the predictions of Akerlof and Kranton’s (2000) identity economics model and Goldin’s (2014) pollution theory of discrimination, which predict retaliatory or otherwise unproductive behaviors when women enter a male-dominated occupation. The paper shows that, to the extent identity concerns shape male responses, these are confined to subjective perceptions and do not manifest in diminished performance, retention, or conduct.

Q: What are the policy implications for employers considering gender integration? A: The paper provides evidence against the argument that men will become less productive when women enter previously male-only occupations, a justification sometimes offered for excluding women from such jobs. The finding that performance and behavior are unaffected—and misconduct actually declines—allows policymakers and employers to weigh these results against concerns about operational or productivity costs of integration. The perception gap between men’s attitudes and actual outcomes points to a need for targeted leadership and organizational interventions, particularly around the introduction of female leaders.

Ground Combat Exclusion Policy (GCEP): The U.S. military policy, rescinded in 2013 and fully eliminated by Secretary of Defense Carter in 2016, that precluded women from serving in infantry and armor positions; the policy whose removal is the source of the integration shock studied. | Staggered difference-in-differences: The empirical strategy exploiting the sequential, non-systematic integration of women into combat companies across years 2017–2023, using never-yet-treated companies as a comparison group with company fixed effects and BCT-by-year-of-arrival fixed effects. | Performance and Behavior Index: An equally weighted average of z-scored administrative outcomes (retention, no misconduct separations, no demotions, no criminal investigations, no medical profiles, promotion to Sergeant, physical fitness pass/fail and score), constructed for enlisted soldiers, oriented so higher values indicate better outcomes. | Leaders First policy: An Army requirement that a female officer be assigned to a combat company before or alongside female junior enlisted soldiers to ensure female leadership presence at integration; adherence was not universal, with 17% of integrating companies not following it within one month. | Defense Organizational Climate Survey (DEOCS): A congressionally mandated, annually administered, anonymous survey of military unit members covering organizational effectiveness, equal opportunity, and sexual assault prevention and response; the source of workplace perception outcomes. | Pollution theory of discrimination: Goldin’s (2014) theory that men may seek to exclude women from occupations because women’s presence is perceived to diminish the occupation’s prestige or status, potentially leading to retaliatory or unproductive behaviors among incumbent male workers. | Perception-performance wedge: The paper’s central finding that men’s subjective workplace quality perceptions decline with integration—especially when a female officer is present—even as objective administrative performance and behavior metrics show null to positive effects, a divergence between attitudes and measurable outcomes.