***Descriptive statistics*** logout , save(mytable) word replace :tabstat IT IT_dummy AI AI2 Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee, s(N mean min max p50 sd variance) f(%12.3f) c(s) ***Benchmark regression*** reghdfe AI IT ,a(id year)vce(r) est sto a1 reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee,a(id year)vce(r) est sto a2 reghdfe AI IT_dummy ,a(id year)vce(r) est sto a3 reghdfe AI IT_dummy Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee,a(id year)vce(r) est sto a4 ***Mediation effect and moderation effect*** reghdfe DTA IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee,a(id year)vce(r) est sto a5 reghdfe AI DTA Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee,a(id year)vce(r) est sto a6 center IT TFP_LP gen interact =c_IT*c_TFP_LP reghdfe AI IT TFP_LP interact Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee,a(id year)vce(r) est sto a7 ***Robust Test*** reghdfe AI2 IT ,a(id year)vce(r) est sto c1 reghdfe AI2 IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee,a(id year)vce(r) est sto c2 tobit AI2 IT i.year,vce(r) est sto c3 tobit AI2 IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee i.year,vce(r) est sto c4 xtlogit AI2 IT i.year,vce(r) est sto c5 xtlogit AI2 IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee i.year,vce(r) est sto c6 ***Endogeneity test*** gen l_IT=l.IT reg IT l_IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee i.year , r est sto d1 ivregress 2sls AI Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee (IT=l_IT) ,r first est sto d2 ***Step1:heckman xtprobit AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee i.year est sto d3 predict y,xb gen imr=normalden(AI)/normal(AI) ***Step2:heckman reg AI IT imr Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee i.year est store d4 ***Heterogeneity analysis*** reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if SOE==0,a(id year)vce(r) est sto b1 reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if SOE==1,a(id year)vce(r) est sto b2 xtreg AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee i.year if HighTech_1==0 , fe r est sto b3 xtreg AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee i.year if HighTech_1==1 , fe r est sto b4 reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if West==1,a(id year)vce(r) est sto b5 reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if Mid==1,a(id year)vce(r) est sto b6 reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if East==1,a(id year)vce(r) est sto b7 ***External factor analysis*** reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if Technology_i==1,a(id year)vce(r) est sto h1 reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if Labor_i==1,a(id year)vce(r) est sto h2 reghdfe AI IT Size BM ROA Mshare GrossProfit TOP3a Quick Mfee2 FIXED AuditFee if Asset_i==1,a(id year)vce(r) est sto h3