{"kind":"assistant","text":"IV2SLS.from_formula('peasantrepresentation_1864 ~ 1 + controls + [afreq ~ serfperc1]').fit(cov_type='robust')","tool_calls":[{"args":{"dataset":"ref_iv","endog":["afreq"],"exog":["distance_moscow","goodsoil","lnurban","lnpopn","province_capital"],"instruments":["serfperc1"],"se":"HC1","y":"peasantrepresentation_1864"},"id":"script_1","name":"infer__iv_2sls"}]}