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From |
"Steve Martin" <stephen.martin@york.ac.uk> |

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

Subject |
st: RE: How to use elements of a matrix as constraints in cnsreg |

Date |
Thu, 11 Aug 2011 18:08:08 +0100 |

For anyone interested...one solution is to define a scalar as the relevant element of the matrix scalar define S1=D[1,1] scalar define S2=D[2,1] and then this works constraint 1 llonepenhx=S1 constraint 2 lIMD2007=S2. S. -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Steve Martin Sent: 11 August 2011 17:54 To: statalist@hsphsun2.harvard.edu Subject: st: How to use elements of a matrix as constraints in cnsreg I am using Stata 11. I have a matrix D . matrix list D D[2,1] random llonepenhx -.43352401 lIMD2007 -.19335928 I want to estimate a constrained regression where the values of certain elements of the matrix D serve as constraints in a regression. In particular, I would like to constrain the coefficient on llonepenhx to be equal to -0.43352401 and the coefficient on lIMD2007 to be -0.19335928. Trying constraint 1 llonepenhx=D[1,1] constraint 2 lIMD2007=D[2,1] cnsreg yvar x1var x2var llonepenhx lIMD2007, constraints(1-2) results in (note: constraint number 1 caused error r(131)) (note: constraint number 2 caused error r(131)) Suggestions please. Thanks. Steve * * 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: How to use elements of a matrix as constraints in cnsreg***From:*"Steve Martin" <stephen.martin@york.ac.uk>

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