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From |
"Burak Darbaz" <infinisafricae@hotmail.com> |

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

Subject |
st: RE: RE: Re: statalist-digest V4 #3872 |

Date |
Fri, 6 Aug 2010 18:32:37 +0100 |

Ignore the first part of the question, I made a typo when writing out instruments, it works perfectly now, sorry. The question on lincom is still valid though :) Thanks Burak Darbaz -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Burak Darbaz Sent: 06 August 2010 18:26 To: statalist@hsphsun2.harvard.edu Subject: st: RE: Re: statalist-digest V4 #3872 Dear Professor Baum, Thanks a lot for the answer. First, in the original specification (unrestricted), I get the following coefficients F.gnd = .5361618 L.gnd = .4614466 (they are all significant), so they already sum up to approximately one. Then, when I try to restrict it by using the approach you have shown (D.gnd on the left hand side and F.gnd-L.gnd on the right hand side), I get a coefficient FLgnd = .4480393 (significant) Isn't this a bit off? I mean, it drops from .53 to .44 even though the unrestricted model's coefficients almost sum up to one. Besides that, I couldn't manage to use lincom to get the coeff on L.gnd, however, shouldnt 1-(FLgnd's coefficient) should be enough to get it? Thanks a lot Burak Darbaz -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Christopher Baum Sent: 06 August 2010 15:36 To: statalist@hsphsun2.harvard.edu Subject: st: Re: statalist-digest V4 #3872 <> On Aug 6, 2010, at 2:33 AM, Burak wrote: > I am trying to estimate an hybrid New Keynesian Phillips curve. Currently I > am using ivreg2 with the following command > > ivreg2 gnd dum11 dum22 dum33 L.gnd mc (F.gnd = L.gnd L2.gnd L3.gnd L4.gnd > L.cpi L2.cpi L3.cpi L4.cpi L.rint L2.rint L3.rint L4.rint L.bpfilt L2.bpfilt > L3.bpfilt L4.bpfilt L.mc L2.mc L3.mc L4.mc), gmm2s robust bw(auto) > > what I want to do is to preimpose a restriction such that the coefficients > of L.gnd and F.gnd sum up to one, and then estimate this. Is there a way to > do this? ivreg2 D.gnd dum11 dum22 dum33 mc (FLgnd = L(1/4).gnd etc. where FLgnd = F.gnd - L.gnd Works the same way as imposing CRTS algebraically on a two-factor production fn. The coefficient on FLgnd is the coefficient of F.gnd in the original eqn. lincom can calculate the point and interval estimate of its complement (the coefficient of L.gnd in the original eqn.) Kit Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html * * 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/ * * 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/ * * 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: Re: statalist-digest V4 #3872***From:*Christopher Baum <kit.baum@bc.edu>

**st: RE: Re: statalist-digest V4 #3872***From:*"Burak Darbaz" <infinisafricae@hotmail.com>

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