Duration Analysis
ref:Winkleman pp.275-277,data:kids.dta, code's source: kids2.do l.132-
サバイバルモデルにあてはめる。
streg
/*Duratoin Analysis of Age at First Birth*/ /*Winkleman pp.275-277*/ keep if year==2002 & afb<40 tabstat kids age, statistics( count mean sd ) by(year) columns(variables) stset afb, failure(afb) streg educ sibs white immig lowinc16 city16, nohr robust d(exponential) estimates store exponential stcurve, hazard streg educ sibs white immig lowinc16 city16, nohr robust d(weibull) estimates store weibull stcurve, hazard streg educ sibs white immig lowinc16 city16, nohr robust d(gompertz) estimates store gompertz stcurve, hazard streg educ sibs white immig lowinc16 city16, d(lognormal) estimates store lognormal stcurve, hazard streg educ sibs white immig lowinc16 city16, d(lognormal) frailty(gamma) estimates store gamma stcurve, hazard stcox educ sibs white immig lowinc16 city16, basehc(bhc) estimates store bcox stcurve, hazard estimates table exponential weibull gompertz lognormal gamma, t stats(N ll) b(%8.3f) estimates table bcox, t stats(N ll) b(%8.3f) keep (educ sibs white immig lowinc16 city16)