{"kind":"assistant","text":"IV2SLS.from_formula('fourpack_1_01 ~ 1 + democrat + [anger ~ treated]').fit(cov_type='robust')","tool_calls":[{"args":{"dataset":"ref_iv","endog":["anger"],"exog":["democrat"],"instruments":["treated"],"se":"HC1","y":"fourpack_1_01"},"id":"script_1","name":"infer__iv_2sls"}]}