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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: AW: nlcom |

Date |
Mon, 14 Jun 2010 10:56:05 +0100 |

Without attempting to answer this directly I did notice that in your last command the reference to exp(xb1) was probably a typo for exp(`xb1') Nick n.j.cox@durham.ac.uk Martin Weiss Marginal effects are best estimated using -margins-. What is your reason for not using it? What is the error description (the code number is not that informative)? If you want -quietly- and the -r(mean)- returned value, you can also use the -meanonly- option of -summ-. Olivia Bacha I am running the following code after logit estimation using nlcom, this is to estimate marginal effects. quietly sum gastos local gastosM= r(mean) quietly sum var60 local var60M= r(mean) quietly sum gastopc local gastopcM= r(mean) quietly sum gastopcreeleição local gastopcreeleiçãoM=r(mean) quietly sum Idade local IdadeM=r(mean) quietly sum qualidade local qualidadeM=r(mean) quietly sum qtpart local qtpartM=r(mean) quietly sum educ local educM=r(mean) local xb1 _b[prop_gasto]*(`gastosM'/`var60M') + _b[gastopc]*`gastopcM' + _b[reeleição] + _b[gastopcreeleição]*`gastopcreeleiçãoM' + _b[Idade]*`IdadeM' + _b[qualidade]*`qualidadeM' + _b[qtpart]*`qtpartM' + _b[educ]*`educM' local xb0 _b[prop_gasto]*(`gastosM'/`var60M') + _b[gastopc]*`gastopcM' + _b[Idade]*`IdadeM' + _b[qualidade]*`qualidadeM' + _b[qtpart]*`qtpartM' + _b[educ]*`educM' nlcom (a1:(1/(1+ exp(`xb1')))^2) (a2:(`var60M' - `gastosM')/`var60M'^2), post nlcom _b[a1] * _b[prop_gasto] * _b[a2] nlcom (-1) * ((1/(1+ exp(`xb0'))) ^2) * _b[prop_gasto] * (`var60M' - `gastosM')/`var60M'^2 nlcom ((1/(1+ exp(xb1))) ^2) * _b[prop_gasto] * (1/`var60M')^2 * `gastosM' Stata is returning error 198 when i start using nlcom. What's my mistake? * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: RE: AW: nlcom***From:*Olivia Bacha <oliviabacha@gmail.com>

**References**:**st: nlcom***From:*Olivia Bacha <oliviabacha@gmail.com>

**st: AW: nlcom***From:*"Martin Weiss" <martin.weiss1@gmx.de>

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