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From |
emanuele mazzini <madsoenistata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Margins for interactions terms |

Date |
Tue, 10 Dec 2013 10:20:01 +0100 |

Thank you for your advices, and sorry for the misunderstanding. Emanuele. 2013/12/9 Nick Cox <njcoxstata@gmail.com>: > Good advice. It's a fair guess that this program needs more than minor > surgery to perform with -margins-. > Nick > njcoxstata@gmail.com > > > On 9 December 2013 21:19, Richard Williams > <richardwilliams.ndu@gmail.com> wrote: >> At 02:43 PM 12/9/2013, Nick Cox wrote: >>> >>> You asked a similar question before. >>> >>> http://www.stata.com/statalist/archive/2013-12/msg00300.html >>> >>> -reg2hdfe- is a user-written program from SSC, as you are asked to >>> explain. Evidently the author is not an active member of Statalist; >>> many users, naturally, are not. >>> >>> Adding code to return e(sample) is documented at -help ereturn-. You >>> would need to clone the program, find the appropriate place to add >>> code and take responsibility for what happens. Alternatively, try >>> emailing the author directly. >> >> >> Without even looking at the code I bet it is even more complicated than >> that. The program was written for Stata 9.1 which is pre-factor variable >> notation. So, my guess is that margins is not going to handle the >> interaction term correctly. >> >> >> >>> Nick >>> njcoxstata@gmail.com >>> >>> >>> On 9 December 2013 16:45, emanuele mazzini <madsoenistata@gmail.com> >>> wrote: >>> > Dear all, >>> > >>> > I am estimating a gravity model with exporter-year and importer-year >>> > FE with an interaction term and the reg2hdfe command, as follows: >>> > >>> > >>> > reg2hdfe ln(trade_flow) ln(gdp_o) ln(gdp_d) ln(distance) x1 x2 x1*x2, >>> > id1(it) id2(it) >>> > >>> > where it and jt are defined as: >>> > >>> > egen it = group (iso_o year) >>> > egen jt = group (iso_d year) >>> > >>> > After I obtain the estimation results, I try to run the margins >>> > command as to obtain the marginal effect of x1 on the dependent >>> > variable lx and draw a marginsplot. >>> > >>> > Unfortunately, when I run -margins- Stata returns me the following >>> > error: >>> > >>> > e(sample) does not identify the estimation sample. >>> > >>> > which seems a bit strange to me, because -ereturn list- gives me the >>> > e(N) >>> > function. >>> > >>> > Anyone knows how to add the e(sample) to the list of functions that >>> > -reg2hdfe- returns? >>> > >>> > Thank you in advance, >>> > >>> > Regards, >>> > >>> > Emanuele. >>> > * >>> > * For searches and help try: >>> > * http://www.stata.com/help.cgi?search >>> > * http://www.stata.com/support/faqs/resources/statalist-faq/ >>> > * http://www.ats.ucla.edu/stat/stata/ >>> * >>> * For searches and help try: >>> * http://www.stata.com/help.cgi?search >>> * http://www.stata.com/support/faqs/resources/statalist-faq/ >>> * http://www.ats.ucla.edu/stat/stata/ >> >> >> ------------------------------------------- >> 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/faqs/resources/statalist-faq/ >> * http://www.ats.ucla.edu/stat/stata/ > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Margins for interactions terms***From:*emanuele mazzini <madsoenistata@gmail.com>

**Re: st: Margins for interactions terms***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: Margins for interactions terms***From:*Richard Williams <richardwilliams.ndu@gmail.com>

**Re: st: Margins for interactions terms***From:*Nick Cox <njcoxstata@gmail.com>

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