None, because economists aren't big on testing, AFAIK, and empirical methods beyond meta-studies. It's still a very soft science, correct me if I'm wrong. Joke

None, because economists aren't big on testing, AFAIK, and empirical methods beyond meta-studies. It's still a very soft science, correct me if I'm wrong. Joke was that an economist that tests his hypothesis is a trader. Econometrics and psycho-economics have just overturned the rational actor model that was the mainframe of classical economics. Maybe they'll add more empirical methods as well.