At this point you can start doing your literature search. Tell your professors about what you've discovered|nine times out of ten they'll tell you to look in the \1983 AER" or \Econometrica 77" or some textbook (maybe even one of mine). And lots of the time they'll be right. You'll look there and nd \your" model|but it will be much better done, much more fully developed, and much clearer. Hey, no one said research would be easy. But this is a point where you really have a chance to learn something|read the article(s) carefully and ask yourself \Why didn't I do that?" If someone started with the.