hac_lags,beta_se_hac 0,0.028957130333809637 1,0.032494272586931806 2,0.034370831642247524 4,0.03598488399675878 8,0.03729120927832667 12,0.03656150942843361 OLS_iid,0.01996009291490984 HC1,0.028957130333809616