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Re: st: Is multilevel model the correct model?


From   Marcello Pagano <pagano@hsph.harvard.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Is multilevel model the correct model?
Date   Wed, 09 Feb 2011 14:04:13 -0500

One of the constants in the bleak winter is that it must come to an end. But that does not detract from the value of the signs of Spring; they are surely welcome even if they predictably come each year. So the singing of birds, the day getting longer, the crocuses sprouting through the snow, these are all signs we look for in the North at this time of year. Other signs that also trumpets the end of the scholastic year are the exams and term projects that need to be completed. The tell tale signs of "x and y" that are common to many homework and exam questions. We sometimes see these on Statalist, even though the practice is discouraged.

Ah Spring!

m.p.



On 2/9/2011 8:34 AM, Shikha Sinha wrote:
Hi there,

I have individual level data for 30 countries, and I am exploring the
effect of x on y. I estimate an OLS in the pooled sample with country
fixed effect and then estimate the same model for each country
separately. The aim of the analysis is to explore whether the
relationships between x and y are associated in ways that vary between
countries. Should multi-level models be used to demonstrate the extent
to which there is national variation in these relationships? Kindly
advise if the correct model is random intercept or random coefficient
or may be an interaction model will do the trick?

Thanks,
Shikha
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