log using lab8-1dic, text set matsize 400 clear use "C:\Documents and Settings\computob.CUOTAS\Escritorio\NES92_clean.dta", clear ************************************************************************ ** HOY VAMOS A ANALIZAR LA VARIABLE "PRESIDENTIAL APPROVAL" DE BUSH PAPA ************************************************************************ /* Para hacerlo usaremos el comando oprobit -- ordered probit */ summ desc summ bushapp, detail hist bushapp oprobit bushapp place distclinton badecon party educ income nonwhite, robust oprobit bushapp place distclinton badecon party educ if e(sample), robust ** e(sample) restringe la regresion a la misma muestra de la ultima regresion en memoria predict p0 p1 p2 p3 hist p0 hist p1 ** Engaņando a stata para obtener probabilidades predichas para casos especificos ** p.ej. Como cambia la probabilidad de que me guste/disgute bush conforme aumenta la ** cacion---manteniendo CONSTANTE TODO LO DEMAS... ** sustituir variables con el valor promedio de cada una de ellas... gen place2 = place gen distc2 = distclinton gen badecon2 = badecon gen party2 = partyID gen income2 = income drop place distclinton badecon partyID income egen place=mean(place2) egen distclinton = mean(distc2) egen badecon = mean(badecon2) egen partyID = mean(party2) egen income = mean(income2) predict q1 q2 q3 q4 summ q* p* ** Ahora si podemos graficar la probabilidad de aprobacion a bush, ** conforme aumenta la educacion scatter q1 educ scatter q2 educ scatter q3 educ scatter q4 educ scatter q1 q2 q3 q4 educ log close