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From |
Michael Wahman <Michael.Wahman@svet.lu.se> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Blown up Std. errors in logistic regression with bootstrap |

Date |
Mon, 13 Dec 2010 13:24:17 +0100 |

Dear Statalist subscribers,

Below you can see the main model . bootstrap: logit oppcoaltype124 stunipolardistance lgdpgro ldeltaifhpol lifhpol llndistmag orpreselec parelection dif12party (running logit on estimation sample) Bootstrap replications (50) ----+--- 1 ---+--- 2 ---+--- 3 ---+--- 4 ---+--- 5 .............x.................................... 50 Logistic regression Number of obs = 51 Replications = 49 Wald chi2(8) = 0.00 Prob > chi2 = 1.0000 Log likelihood = -10.060672 Pseudo R2 = 0.6217 ------------------------------------------------------------------------------ | Observed Bootstrap Normal- based oppcoalt~124 | Coef. Std. Err. z P>|z| [95% Conf. Interval] ------------- +---------------------------------------------------------------- stunipolar~e | 7.811848 5599.462 0.00 0.999 -10966.93 10982.56 lgdpgro | -.883474 678.2268 -0.00 0.999 -1330.183 1328.417 ldeltaifhpol | 4.764161 4410.229 0.00 0.999 -8639.125 8648.654 lifhpol | .8676982 764.7985 0.00 0.999 -1498.11 1499.845 llndistmag | .1585821 325.1274 0.00 1.000 -637.0795 637.3966 orpreselec | -1.598148 915.6822 -0.00 0.999 -1796.302 1793.106 parelection | -2.872295 2864.866 -0.00 0.999 -5617.907 5612.162 dif12party | .0150251 51.14297 0.00 1.000 -100.2234 100.2534 _cons | -8.61135 6590.954 -0.00 0.999 -12926.64 12909.42 ------------------------------------------------------------------------------ Note: one or more parameters could not be estimated in 1 bootstrap replicate; standard-error estimates include only complete replications.

Receives the answer: repeated time values within panel the most likely cause for this error is misspecifying the cluster(), idcluster(), or group() option

2) logit oppcoaltype124 stunipolardistance lgdpgro ldeltaifhpol lifhpol llndistmag orpreselec parelection dif12party, vce(boot) cluster(country) Receives the answer: no observations Do anyone get what the problem might be?

Thank you for your help, Michael * * 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/

**Follow-Ups**:**Re: st: Blown up Std. errors in logistic regression with bootstrap***From:*Maarten buis <maartenbuis@yahoo.co.uk>

**Re: st: Blown up Std. errors in logistic regression with bootstrap***From:*Stas Kolenikov <skolenik@gmail.com>

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