{"kind":"assistant","text":"mean(d_t) - mean(d_c) with SE sqrt(s2_t/n_t + s2_c/n_c): OLS of d on the cohort dummy, HC2","tool_calls":[{"args":{"dataset":"ref_panel","se":"HC2","x":["treated"],"y":"d"},"id":"script_1","name":"infer__ols"}]}