PopResume: Causal Fairness Evaluation of LLM/VLM Resume Screeners with Population-Representative Dataset

Sumin Yu, Juhyeon Park, Taesup Moon


Abstract
We present PopResume, a population-representative resume dataset for causal fairness auditing of LLM- and VLM-based resume screening systems. Unlike existing benchmarks that rely on manually injected demographic information and outcome-level disparities, PopResume is grounded in population statistics and preserves natural attribute relationships, enabling path-specific effect (PSE)-based fairness evaluation. We decompose the effect of a protected attribute on resume scores into two paths: the business necessity path, mediated by job-relevant qualifications, and the redlining path, mediated by demographic proxies. This distinction allows auditors to separate legally permissible from impermissible sources of disparity. Evaluating four LLMs and four VLMs on PopResume’s 60.8K resumes across five occupations, we identify five representative discrimination patterns that aggregate metrics fail to capture. Our results demonstrate that PSE-based evaluation reveals fairness issues masked by outcome-level measures, underscoring the need for causally-grounded auditing frameworks in AI-assisted hiring.
Anthology ID:
2026.emnlp-main.2
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
18–39
Language:
URL:
https://aclanthology.org/2026.emnlp-main.2/
DOI:
Bibkey:
Cite (ACL):
Sumin Yu, Juhyeon Park, and Taesup Moon. 2026. PopResume: Causal Fairness Evaluation of LLM/VLM Resume Screeners with Population-Representative Dataset. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 18–39, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
PopResume: Causal Fairness Evaluation of LLM/VLM Resume Screeners with Population-Representative Dataset (Yu et al., EMNLP 2026)
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PDF:
https://aclanthology.org/2026.emnlp-main.2.pdf