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From |
Richard Williams <richardwilliams.ndu@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: margins after oprobit with interactions |

Date |
Tue, 22 Nov 2011 08:31:58 -0500 |

At 10:16 AM 11/21/2011, Vincenzo Carrieri wrote:

Dear Statalisters, I am estimating an ordered probit model:Happy=age+age^2+income+income*age+income*age2 , that in "factormodel style" is:oprobit happy c.age c.age#c.age c.income c.income#c.age c.income#c.age#c.age where Happy is a 5 point scale oredered variable. I would like to have marginal effects of all these variables. I am using the command margins. So for instance, for the top category I write: margins , dydx(*) predict (outcome(5)) Stata gives me only two marginal effects: one for age and one for income. If I have understood well, these marginal effects are estimated by STATA taking into account the fact that income is interacted with age, age is squared and income is interacted also with age squared. Is it right? In addition, why I don't get also the marginal effect of the interaction terms? If I do the first derivatives of the model, I get dy/dincome, dy/dage but also dy/dagedincome. IS there a way to get marginal effect for interaction terms with margins, or any other command in Stata?

http://www.stata-journal.com/article.html?article=st0063

------------------------------------------- Richard Williams, Notre Dame Dept of Sociology OFFICE: (574)631-6668, (574)631-6463 HOME: (574)289-5227 EMAIL: Richard.A.Williams.5@ND.Edu WWW: http://www.nd.edu/~rwilliam * * 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/

**References**:**st: margins after oprobit with interactions***From:*Vincenzo Carrieri <vincenzo.carrieri@gmail.com>

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