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st: ZIP with Sample Selection


From   James McJoseph <[email protected]>
To   [email protected]
Subject   st: ZIP with Sample Selection
Date   Wed, 1 Dec 2010 08:55:32 +0200

Dear List
1. I am considering using ZIP with Sample Selection (in Full
Information Maximum Likelihood). Has anyone written a code for this,
kindly guide me to the right direction.
2. Is it appropriate to apply a count model to a data where the only
count present in the data are: 0, 1, 2.  Counts above 2 are possible
but very extremely rare. Another consideration, the occurance of
counts are not equally probable. 0 is more probable than 1. 1 is more
probable than 2, Hence 3 and above are much less probably to even
unlikely. Thanks in advance.
James
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