Z-statistics in parenthesis

[Sebastian Grein]

Hi, I want to display tstats in the brackets of the results of a logistic regression. Even when adding tstat as an option in the command, the result table reports "z-statistics in parentheses". What am I doing wrong?

logistic deal DE_F3 Size_lag1 BTM_lag1 Leverage_lag1 ROA_lag1 Capex_lag1 Cash_lag1 i.Year i.SIC_two //löschen
outreg2 using freq_results_rob_size.xls, append title(Table 1: CCR Frequency and Likelihood of becoming an Acquirer) ctitle(logit,Ind-Size,deal) bdec(4) tstat tdec(2) addtext(Year FE, YES, Industry FE, YES) keep(DE_F3 Size_lag1 BTM_lag1 Leverage_lag1 ROA_lag1 Capex_lag1 Cash_lag1) sortvar(DE_F4 DE_F3)  addstat(Pseudo R-squared, e(r2_p)) eform

[Clyde Schechter]

There aren't any t-statistics with logistic regression. It is estimated by maximum likelihood, which always yields z-statistics, not t-statistics. This is because the sampling distribution of the ratios of coefficients to standard errors produced by maximum likelihood estimation is asymptotically normal, but is not guaranteed to have a t-distribution in small samples (and, in fact, typically doesn't.)