Bill Gould <[email protected]> and Vince Wiggins
<[email protected]> provided a nice solution to the large -areg-
problem Tim Sass <[email protected]> presented.
I just want to point out 2 typos that might confuse you. In
part of the instructions they say
> . by group: gen double mu_x2 = sum(x2)/_N
> . gen double x1dev = x2 - mu_x2
It should be
. by group: gen double mu_x2 = sum(x2)/_N
. gen double x2dev = x2 - mu_x2
They accidentally typed x1dev where they should have had x2dev.
Then later, they say:
> Think about the values that can appear in d1dev. Because Tim has only
> two groups, the values of d1 are (0,0), (1,1), (1,0), or (0,1). The
> mean is thus 0, 1, .5, or .5, and d1dev is -.5, 0, or .5.
Instead of saying "... Tim has only two group, ..." they meant to
say "... Tim has groups with only two observations per group, ..."
The solution they provide depends on there being at most two
observations in each group.
Ken Higbee [email protected]
StataCorp 1-800-STATAPC
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