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Missing Results of Discrimination: A Systematically Comparative Meta-Analysis and Re-Examinations of Racial, Gender, and Intersectional Discrimination using Correspondence Audits

Under ReviewWorking Paper
S. Michael Gaddis, Natasha Quadlin, Edvard Nergård Larsen, Charles Crabtree, and John B. Holbein
Working paper. Available at SocArXiv.
Publication year: 2025

Abstract

Intersectionality theory argues that race and gender cannot be fully understood in isolation or through an additive approach. However, field experiments frequently examine aggregate racial or gender discrimination without accounting for within-category differences (e.g., gendered variations in racial discrimination) or intersectionality. Building on theoretical perspectives of intersectionality, we introduce a systematically comparative analytic framework designed to (a) identify missing results of correspondence audits and (b) provide recommendations to help scholars conduct more holistic analyses. We conduct a meta-analysis of 52 correspondence audits, encompassing nearly 330,000 tests for discrimination, and a re-examination of each study using seven discrimination ratios. The meta-analysis reveals a previously overlooked pattern in rental housing discrimination: compared to White men, Black men experience discrimination, Black women’s outcomes are statistically similar, and White women receive preferential treatment. Additionally, our re-examination uncovers ten ways scholars may unintentionally miss key findings when failing to adopt a systematically comparative intersectional approach. We conclude with best-practice recommendations to guide scholars in designing, analyzing, and citing correspondence audits, helping them avoid these problematic scenarios. Importantly, our framework extends beyond field experiments focused on race and gender and can be broadly applied to research on disparities, enabling more comprehensive analyses across numerous dimensions.

Keywords: racial/ethnic discrimination, gender discrimination, correspondence audits, intersectionality, meta-analysis

Understanding Discrimination in College Admissions: A Field Experiment

Under ReviewWorking Paper
Vitor Melo, Hugo Vaca Pereira Rocha, Liam Sigaud, Patrick L. Warren, and S. Michael Gaddis
Working paper. Available at SSRN.
Publication year: 2025

Abstract

We examine the extent and mechanisms by which race affects the college admissions process. We provide evidence from a field experiment where fictitious applicants request application fee waivers from all university admissions counselors in the United States. White applicants are much more likely to receive a waiver, be informed that the application is free, or receive a request for more information than Black or Asian applicants. Our results contrast sharply with previous evidence from acceptance decisions showing bias in favor of Black applicants. We introduce a model of university pricing and use information from counselors’ LinkedIn and university profiles, along with university characteristics, to test predictions. We find evidence consistent with agent-taste-based discrimination, where biases stem from counselors’ preferences, and profit-maximizing statistical discrimination. Discrimination in university admissions can vary substantially based on the context in which decisions are made.

Keywords: racial/ethnic discrimination, correspondence audits, higher education

Membership has its Privileges: An Experiment Examining How Alumni Affiliation and Race Influence Job-Finding Assistance

R&RUnder ReviewWorking Paper
S. Michael Gaddis, Steve McDonald
Working paper. Available at SSRN.
Publication year: 2024

Abstract

Research on higher education and employment outcomes tends to ignore the social capital benefits that accrue to graduates via alumni membership. To what extent does shared university affiliation promote job-finding assistance and positive individual and career perceptions from fellow alumni? Further, does this support vary by job seekers’ race? Using a survey experiment, we provided 522 White college-educated employed men with a vignette showing them an InMail message on LinkedIn from someone seeking job-finding assistance. We included two primary treatment conditions: (1) whether vignettes matched the same university from which the respondent graduated and (2) the race (White or Black) of the InMail message sender. Respondents reported being more likely to respond to and assist individuals who had the same university affiliation, regardless of the message sender’s race. They also perceived same-affiliation job seekers as more likely to get a job at their organization and felt greater responsibility for their employment success. While some positive perceptions of affiliation extended equally to White and Black job seekers, White job seekers garnered significant advantages in perceptions of personal dedication and future employment success. This first-ever test of affiliation-based social capital provides new insights into the link between educational stratification and economic inequality.

Keywords: social capital, employment, job search, educational credentials, alumni

Do Naming Practices Influence Boundary Crossing for Immigrants in the U.S.? Experimental Evidence on Perceptions of Multi-Generational Nativity, Citizenship Status, and Race/Ethnicity

Under ReviewWorking Paper
S. Michael Gaddis, A. Nicole Kreisberg, Charles Crabtree
Working paper. Available at SSRN.
Publication year: 2024

Abstract

Immigrants have several tools at their disposal to assimilate into and cross over nativity and racial/ethnic boundaries in receiving countries. First names, for example, can mark immigrants’ children as more ‘American’ and less ‘immigrant’ and perhaps limit discrimination based on nativity status. However, limited research examines how Americans perceive such names, restricting scholarly understanding of who is allowed to cross nativity and racial/ethnic boundaries. We conduct four survey experiments with 6,651 respondents, examining 80,920 perceptions of multi-generational nativity, citizenship status, and race/ethnicity from 712 racialized names. We find that respondents rate fully-ethnic Chinese, Hispanic, and Indian names as more likely to belong to recent immigrants and less likely to belong to citizens than White and Black names. Respondents rate anglicized first names with ethnic last names between those groups. Moreover, they view anglicized first names with Hispanic last names as less likely to belong to recent immigrants and more likely to belong to citizens and Whites than other ethnic counterparts. Our findings suggest that (1) individuals with anglicized Hispanic names are most able to cross boundaries and (2) overall boundaries based on nativity may be more porous than those based on race and ethnicity.

Keywords

  • Immigration
  • Citizenship
  • Names
  • Nativity
  • Boundary Formation

Racial/Ethnic Discrimination and Heterogeneity Across Schools in the U.S. Public Education System: A Correspondence Audit of Principals

R&RUnder ReviewWorking Paper
S. Michael Gaddis, Charles Crabtree, John B. Holbein, and Steven Pfaff
Working paper.
Publication year: 2024

Abstract

Although numerous studies document different forms of discrimination in the U.S. public education system, very few provide plausibly causal estimates. Thus, it is unclear to what extent public school principals discriminate against racial and ethnic minorities. Moreover, no studies test for heterogeneity in racial/ethnic discrimination by individual-level resource needs and school-level resource strain – potentially important moderators in the education context. Using a correspondence audit, we examine bias against Black, Hispanic, and Chinese American families in interactions with 52,792 public K-12 principals in 33 states. Our research provides causal evidence that Hispanic and Chinese American families face significant discrimination in initial interactions with principals, regardless of individual-level resource needs. Black families, however, only face discrimination when they have high resource needs. Additionally, principals in schools with greater resource strain discriminate more against Chinese American families. This research uncovers complexities of racial/ethnic discrimination in the K-12 context because we examine multiple racial/ethnic groups and test for heterogeneity across individual- and school-level variables. These findings highlight the need for researchers conducting future correspondence audits to expand the scope of their research to provide a more comprehensive analysis of racial/ethnic discrimination in the U.S.

Keywords

  • Correspondence audits
  • K-12 education
  • Racial/ethnic discrimination
  • Public schools

Signaling Class: An Examination of the Treatment Validity of Names Used to Signal Race in Bias Experiments with Methodological Recommendations for Name Selection

R&RUnder ReviewWorking Paper
S. Michael Gaddis
Working paper. Available at SSRN.
Publication year: 2023

Abstract

Racial bias experiments commonly use names to signal race as treatments. However, recent methodological examinations find that individuals often perceive class and race together. This calls into question the treatment validity of thousands of experiments. Still, little evidence exists on what leads to name perceptions and how scholars might increase treatment validity in future studies. I suggest that racialized and classed demographic naming patterns may influence individuals’ perceptions of names. I conducted two survey experiments and used demographic birth record data to examine social class perceptions. In total, 7,695 respondents provided 82,321 perceptions on 636 combinations of first and last names. Although demographic naming patterns have small effects on respondents’ social class perceptions of White-signaled names, classed patterns have a large effect on respondents’ perceptions of Black-signaled names. These findings suggest that treatment validity is a severe problem for bias experiments. To help mitigate this problem, I provide seven recommendations that researchers should implement in all experiments that use names to signal various characteristics. Scholars who follow these recommendations will neutralize or minimize threats to treatment validity, engage in a more empirical and open scientific process, and, in some cases, open up new avenues of research on bias.

Keywords

  • Social class
  • Racial/ethnic discrimination
  • Names
  • Audit Studies
  • Experiments

Discrimination Against Black and Hispanic Americans is Highest in Hiring and Housing Contexts: A Meta-Analysis of Correspondence Audits

Working Paper
S. Michael Gaddis, Edvard Nergård Larsen, Charles Crabtree, John B. Holbein
Working paper. Available at SSRN.
Publication year: 2022

Abstract

To what extent does racial/ethnic discrimination in America differ across contexts? In this paper, we provide the largest and most comprehensive review of racial/ethnic discrimination research to date. We conducted a meta-analysis of 78 correspondence audits in the United States, representing over half a million applications, emails, and other forms of correspondence that occur in all aspects of modern society, including the hiring, housing, medical, public services, and education sectors. We find that racial/ethnic discrimination in the United States continues to be a large problem, but discrimination against racial/ethnic minorities simultaneously exhibits a substantial amount of contextual heterogeneity not recognized in previous discrimination research. Discrimination against Black Americans is most common in hiring, followed by the rental housing context. Discrimination against Hispanic Americans is highest in hiring, but discrimination in other contexts is considerably lower. Although discrimination occurs in education, medical, and public services contexts, it is far less common in these sectors. Altogether, our findings suggest that discrimination is more common in economic contexts that are more resource-intensive and have higher stakes, despite stronger legal protections against discrimination in those same contexts. Our work confirms that racial/ethnic discrimination in the United States continues to be a persistent and pervasive phenomenon that impacts many core parts of the lives of Black and Hispanic Americans and simultaneously reinforces and exacerbates existing inequalities.

Keywords

  • Racial/ethnic discrimination
  • Correspondence audits
  • Field experiments
  • Meta-analysis

Moving to the City: An Audit Study Examining the Consequences of Racial/Ethnic Discrimination on Residential Segregation

Working Paper
S. Michael Gaddis, Nicholas V. DiRago, Raj Ghoshal
Working paper. Available at SSRN.
Publication year: 2019

Abstract

This study uses experimental methods to investigate covert racial discrimination in “roommate wanted” ads on Craigslist. Roommate relationships include significant social dimensions, and are an important site through which segregation may be reproduced or broken down, but have received very little attention by researchers. We develop fictitious racially-coded female names and identities for white, black, Hispanic, Chinese, and Indian room-seekers, along with Hispanic, Chinese, and Indian room-seekers with “Americanized” first names. We implement a field experiment and respond to over 1,500 “roommate wanted” advertisements on Craigslist across three metropolitan areas. Our emails express interest in the roommate-wanted ad, and mention that the sender is college-educated and employed full-time. We monitor response rates in the aggregate and within Census tracts of varying racial and economic characteristics. We find severe discrimination against African Americans, Hispanics, and Chinese-origin individuals. Asians with Americanized first names are treated equally to whites, while traditional Indian names and Americanized Latina names face moderate levels of discrimination. Patterns of discrimination by neighborhood race and class characteristics yield better access to upward mobility for Asian Americans than for underrepresented minority group members. Our findings reveal an important social mechanism that constricts integration and opportunity, shed new light on Asians’ and Latinas’ place in the US race system, reveal important interactions of race and presumed nativity, and show the ongoing relevance of race.

Keywords

  • Housing
  • Racial/ethnic discrimination
  • Audit studies
  • Experiments