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Any advice you can give me would be appreciated. I have some data that
seems appropriate for xttobit analysis. My LHS variables are bounded
between 0 and 100 (percentages), and an unbalanced panel of approximately
300 i's and 4 t's. I used the quadchk command and found that my
estimates were quite sensitive to my choice of quadratures. I played
around with the quadrature option on xttobit, and found that only when I
increased the number of quadratures to about 30 did quadchk show that the
estimates were robust. So, I'm resigned to think that Stata's xttobit
command may not be the best option.
Moving on, I'm curious as to what I might do from here. Are there other
commands that might help me out? Has somebody written a version of
xttobit that uses a different method of approximation?
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