Policy researchers often have to estimate the future effect of imposing a policy in a particular location. There is often evidence on the effects of similar policies in other jurisdictions, but no information on the effects of the policy in the jurisdiction in question. And the policy may have...

Poverty rates on Native American Indian reservations are triple the US average. Small business incubation programs, available elsewhere in the US, are sparse on the reservations. Small businesses are potent drivers of US economic growth. Some 25.5 million entrepreneurs generate more than 50% of...