Notice: On March 31, it was **announced** that Statalist is moving from an email list to a **forum**. The old list will shut down on April 23, and its replacement, **statalist.org** is already up and running.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

From |
"Monuteaux, Michael" <Michael.Monuteaux@childrens.harvard.edu> |

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

Subject |
RE: st: deriving the variance-covariance matrix from point estimates and standard errors |

Date |
Thu, 23 Jun 2011 12:01:14 -0400 |

Thanks for responding. The data are from the NEISS-AIP survey, which is a nationally representative survey of injuries that were treated in U.S. emergency departments. The data are publically available through the CDC's website. For a given type of injury in a given demographic (eg, males), the website provides the estimated national number of injuries, the standard error of this estimate, and the number of survey cases that the estimate was based on. -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Austin Nichols Sent: Thursday, June 23, 2011 11:09 AM To: statalist@hsphsun2.harvard.edu Subject: Re: st: deriving the variance-covariance matrix from point estimates and standard errors Michael <Michael.Monuteaux@childrens.harvard.edu>: This is only possible in a few special cases, without access to the VCE of the original estimates, and the VCE is not typically reported (if it were, you could just take a submatrix; if not you may have to contact the original authors). More detail may help, e.g. are these regression coefs for two dummies and you want to compute a test statistic for the sum of their effects? On Thu, Jun 23, 2011 at 10:13 AM, Monuteaux, Michael <Michael.Monuteaux@childrens.harvard.edu> wrote: > Hello everyone, > > I have two point estimates and their corresponding standard errors from a survey, and I want to calculate the 2-by-2 variance-covariance matrix. Is there a way to do this in STATA? Please note, I do not have the original data, I just have the following info: > The point estimate (in this case, it's the estimated number of cases who answered "yes" to a particular item in the survey) > The standard error, and > The number of records that the estimate was calculated from. > > Any help would be appreciated. Thanks!! > > Michael C. Monuteaux, Sc.D. > Children's Hospital Boston * * 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/

**Follow-Ups**:**Re: st: deriving the variance-covariance matrix from point estimates and standard errors***From:*Austin Nichols <austinnichols@gmail.com>

**References**:**st: deriving the variance-covariance matrix from point estimates and standard errors***From:*"Monuteaux, Michael" <Michael.Monuteaux@childrens.harvard.edu>

**Re: st: deriving the variance-covariance matrix from point estimates and standard errors***From:*Austin Nichols <austinnichols@gmail.com>

- Prev by Date:
**RE: st: stata files in linux** - Next by Date:
**st: Label the variables** - Previous by thread:
**Re: st: deriving the variance-covariance matrix from point estimates and standard errors** - Next by thread:
**Re: st: deriving the variance-covariance matrix from point estimates and standard errors** - Index(es):