Using research designs patterned after randomized experiments, many recent economic studies examine outcome measures for treatment groups and comparison groups that are not randomly assigned. By using variation in explanatory variables generated by changes in state laws, government draft...

Recently, there has been extensive experimental evaluation of reforms of the unemployment insurance (UI) system. The UI experiments can be divided into two main areas: reemployment bonuses and job search programs. The four reemployment bonus experiments offered payments to UI recipients who...

Black entrepreneurship has been unsuccessful in the U.S. The fraction of employed blacks that work in their own businesses is about one-third that of whites. Other measures of success such as net income, number of employees, and form of organization show large differences between blacks and...