Dear R-proffecionals and users,
I have the following two questions.
I have the cross-country sample. The obeservaions in each country varie substantially
and could not use it for the regression because I have several outliers. I do not want
to lose any information from the sample and would like to use it. I would like to
include the all of countries into regression analysis. Yet, I have the problem. I
learned that I should in my case use the weight as an inverse to the observation�s
number in each country. I am not sure if it is right and how I should compute it by
using R. In addition: coudl I run the ordered probit regression by this weight? It was
the first question.
The second question is the following. I found the DFBETA-Test, that should be very
usefull for the purpose of my study, but I could not find any literature how to use
it. Do anybody know how to use it by using R and where could I find any information
more?
Thanks a lot in advance,
Susana
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