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

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

Subject |
Re: st: Calculating predicted probabilities at a given value of one of the independent variables |

Date |
Wed, 26 Oct 2011 19:56:51 -0500 |

At 06:06 PM 10/26/2011, Maria Ana Vitorino wrote:

Dear Statalist users, I would like to calculate some predicted probabilities after fitting a multinomial logit model (asclogit). But, the twist is that I would like to calculate these fitted values for a given level of one of the independent variables. Namely, I would like to set one of the Xs to zero when computing the predicted probability (but not in the estimation). What would be the best way of going about this? Would it make sense to do it in 2 steps? In the first step use "predict xb" and in the second step remove the component of xb that I'm not interested and calculate the probability using "gen" and the logit formula? Or is there a better way?

How about something like this? webuse sysdsn1, clear clonevar xmale = male mlogit insure age i.xmale nonwhite i.site predict p1 p2 p3 replace xmale = 0 predict pp1 pp2 pp3

------------------------------------------- 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: Calculating predicted probabilities at a given value of one of the independent variables***From:*Maria Ana Vitorino <vitorino@wharton.upenn.edu>

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