st: New meta analysis program ROBUMETA

["E. C. Hedberg" <eric.hedberg@me.com>]

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:

        http://www.northwestern.edu/ipr/qcenter/RVE-meta-analysis.html

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.

eric.hedberg@me.com

773 909 6801

echedberg.com

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