[Mediation-information] Effect size from Mediation software

[Kosuke Imai]

Hi Xiayi,

 The estimates are average causal mediation effect estimates.  They do not necessarily correspond to coefficients.  Have a look at this paper which gives a non-technical overview of causal mediation analysis: http://imai.princeton.edu/research/mediationP.html or http://imai.princeton.edu/research/BaronKenny.html

Best,
Kosuke

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Kosuke Imai               Office: Corwin Hall 036
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On Nov 25, 2013, at 12:47 PM, Ke, Xiayi <x.ke at ucl.ac.uk<mailto:x.ke at ucl.ac.uk>> wrote:

Dear Kosuke Imai,

I have been using your mediation analysis methods and software recently. I am wondering whether you can kindly advice me when the non-parametric bootstrapping option is used, what are the effect size "estimates" standing for, how are they obtained (from standardized regression coefficient beta?), and what is the best way to interpret them? I guess their values can only vary between 0 and 1?

I look forward to hearing from you.

BW,

Xiayi.

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