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From |
Nick Cox <n.j.cox@durham.ac.uk> |

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

Subject |
st: RE: bootstrap gives errors with -rd- |

Date |
Fri, 11 Nov 2011 19:09:38 +0000 |

... and -rd- is ? Nick n.j.cox@durham.ac.uk D-Ta I have the following problem. I use the -rd- command to estimate a local effect of (a treatment) X on outcomes Y (several ouotcomes, some binary and some continous) at Z=0 in the following way: bootstrap, rep(200) : rd Y X, n(50) where X=1 if Z>=0 and X=0 if Z<0. Z takes the values: -12 , -11.5, -11, .... ,-0.5, 0, 0.5, 1, ...,12 Around the cut-off value I have 15-20 observations in each category of Z. When I run the command I get a lot of bootstrap replications that fail (red X). This is more so for binary outcomes! I also tried to use -bootstrap, strata(Z) rep(200)- but the problem remains. Can someone explain what I do wrong? * * 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: RE: bootstrap gives errors with -rd-***From:*D-Ta <altruist81@gmx.de>

**References**:**st: bootstrap gives errors with -rd-***From:*D-Ta <altruist81@gmx.de>

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