If you would like to use the bootstrap, I think you want to bootstrap the
data and then run CEM + mediation in each iteration of the bootstrap.
Cheers,
Matt
On Thu, Dec 3, 2020 at 3:48 AM 서연수 <yssshinhwa(a)naver.com> wrote:
Hello!
I had some questions in trying to apply CEM to mediation analysis.
SEM methods work fine with the CEM weights so that on the surface,
mediation seems easy. However, I am not sure that the standard errors are
correct. In mediation analyses, it is recommended to do bootstrapping
instead of using the output z-values and corresponding p-values as mediated
variables often do not follow normal distributions to be highly
conservative.
I have thought of doing bootstrapping with the weights just on the matched
sample but am not if this is the correct approach. For example,
https://www.stata.com/statalist/archive/2012-02/msg00822.html
<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.stata.com_statalist_archive_2012-2D02_msg00822.html&d=DwMGaQ&c=WO-RGvefibhHBZq3fL85hQ&r=6YSa1z0dh30dw09yY3heEd5ah4xg8OpOE9fxPgTq85Y&m=uWTuLm3k0uGMsUk2FO6sCPfKeN3y2WekWn7QIdsRE4o&s=QQAx5ezTRfUgoXdOvsj-epSFsiiBnoQ6oFNeBQo6ZhA&e=>
suggests that bootstrapping needs to be done more complicatedly in order to
correctly incorporate variability.
In sum, I would like to get some feedback on how to correctly do mediation
(and mediated moderation) analysis using CEM. Even if complete answers are
not possible, I would still truly appreciate any kind of related
information.
Thank you in advance.
Best,
Yon Soo Suh
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