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st: zero inflated poisson (zip)
From
Marie-Claire Robitaille-Blanchet <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: zero inflated poisson (zip)
Date
Tue, 17 May 2011 15:49:34 +0800
Dear Statalister,
I am using a zero-inflated poisson to estimate a gravity model of bilateral trade.
* For the poisson-part of the model, the coefficient for the log of distance is: -0.7039
* For the probit-part of the model, the coefficient for the log of distance is: 0.1549
I understand how to interpret separately those coefficients but I am wondering if there is any way I can create one comprehensive measure for the total impact of distance on bilateral trade. Any reference?
Any help would be highly appreciate!
Thanks
Marie-Claire
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