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From |
Kit Baum <baum@bc.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: re: simultaneous equations |

Date |
Fri, 27 Feb 2009 11:54:40 -0500 |

<> Mark said An alternative explanation (similar to Nick's point) is that the scaling of the variables is crazy. Stata can get grumpy when your variables are wildly different orders of magnitude. Try rescaling your variables (including the instruments) - i.e., multiply or divide each one by the appropriate power of 10 - so that they all have a mean of about the same order of magnitude, and then see what happens.

Kit Baum, Boston College Economics and DIW Berlin http://ideas.repec.org/e/pba1.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/

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