<div dir="ltr">As far as I know, there is no reliable frequentist implementation of ordered multi-level in most packages such as R or Stata. My suggestion would be to dichotomize the outcome variable (or use a linear model approximation if you have a large number of categories) or use a Bayesian MCMC approach.<div><br></div><div>Best,</div><div>Kosuke</div></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr"><div>Kosuke Imai</div><div>Department of Politics<br></div><div>Princeton University</div><div><a href="http://imai.princeton.edu" target="_blank">http://imai.princeton.edu</a></div></div></div>
<br><div class="gmail_quote">On Tue, Sep 16, 2014 at 6:46 AM, Angel Rodriguez <span dir="ltr"><<a href="mailto:angel.rodriguez@matiainstituto.net" target="_blank">angel.rodriguez@matiainstituto.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>
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<p><font>Dear subscribers,<br>
<br>
I've read that for causal mediation analysis of multilevel data, lmer or glmer have to be used. Isn't possible therefore to use an ordered categorical mediator in the analysis?<br>
<br>
Thank you very much.<br>
<br>
Angel Rodriguez-Laso</font>
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