{"kind":"assistant","text":"att_gt(yname = 'lemp', gname = 'first.treat', idname = 'countyreal', tname = 'year', xformla = ~1, data = mpdta, est_method = 'reg'): never-treated control group, no covariates, varying base period (the package defaults)","tool_calls":[{"args":{"control_group":"never_treated","dataset":"mpdta","first_treat":"first_treat","time":"year","unit":"countyreal","y":"lemp"},"id":"script_1","name":"infer__did_staggered"}]}