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st: New meta analysis program ROBUMETA


From   "E. C. Hedberg" <[email protected]>
To   [email protected]
Subject   st: New meta analysis program ROBUMETA
Date   Fri, 25 Mar 2011 21:48:46 -0700

Hi all, 

I've submitted a program to SSC called robumeta that will perform meta analysis regressions with dependent effects. 

This program is based on the following paper

Hedges, Larry V., Elizabeth Tipton, and Matthew C. Johnson. 2010. Robust variance estimation
        in meta-regression with dependent effect size estimates. Research Synthesis Methods.
        (www.interscience.wiley.com) DOI: 10.1002/jrsm.5

    Website for further information:


from the help file:

robumeta provides a robust method for estimating standard errors in meta-regression,
    particularly when there are dependent effects. Dependent effects occur in two basic models:
    (1) correlated effects and (2) hierarchical meta-regression. In (1), the dependency arises
    as a result of correlated estimation errors; for example, a study collects two outcome
    measures on each participant and then summarizes these as two effect size measures. In (2),
    the dependency arises as a result of correlated parameters; for example, the same research
    group may publish several studies and there may be elements of these studies that are
    similar to one another.  Importantly, the robust standard error procedure used here does not
    require the underlying correlation structure to be known; additionally, it works for any
    weights and can be used to estimate the mean effect size as well as meta-regression models.
    Finally, note that the procedure also can be used with independent effects, particularly
    when distributional assumptions might be violated. 


Thanks 

-Eric

E. C. Hedberg, Ph.D.
773 909 6801

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