Suppose one estimates a classification or regression tree (CART) for one group
or one time period; and then estimates a CART for another group or time period.
Is there a way to test for a structural change or break across the two groups
or between the two time periods, in other words, is there an analogue of a Chow
Test for CART? Has anyone ever seen anything like this or have any ideas how
one could do it? Thanks for any suggestions.
Charles Cameron
Professor of Politics & Public Affairs
Princeton University
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