st: How Do I limit the observations used in a regression?

[Felix Idelberger <felix.idelberger@neptun.uni-freiburg.de>]

Dear Folks,

It's my first time that I pose a question to this mailing list. First I
would like to express my gratitude towards all that are helpful to
others including me.

I have about 1775 observations of which 1400 show very high values of my
dependent variable. That's why I want to limit the number of
observations with high values of my dependent variable which will be
used in my regression. Additionally, I have 6 independent
dummy-variables which should be all equally represented in the reduction
of these observations to let's say 240. These 1400 observations all have
a value between 90-100.

Does someone know a good way to do this? I would like to tell Stata that
it should only use every fifth observation that matches my criterion and
that it observes an equal amount of observations that fulfill one of my
dummy-variables.

Thank you in advance.

Yours sincerely,
Felix Idelberger
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