InterveneBench: Benchmarking LLMs for Intervention Reasoning and Causal Study Design in Real Social Systems. - Shaojie Shi; Zhengyu Shi; Lingran Zheng; Xinyu Su; Anna Xie; Bohao Lv; Rui Xu; Zijian Chen; Zhichao Chen; Guolei Liu; Naifu Zhang; Mingjian Dong; et al. (CoRR, 2026)