This paper outlines why program evaluation should follow well-respected scientific standards and why it should be performed by independent researchers.

The Peter Principle states that, after a promotion, the observed output of promotedemployees tends to fall. Lazear (2004) models this principle as resulting from a regression tothe mean of the transitory component of ability...

In many environments, tournaments can elicit more effort from workers, except perhapswhen workers can sabotage each other. Because it is hard to separate effort, ability andoutput in many real workplace settings, the empirical evidence on the incentive effect oftournaments is thin...

Small and informal firms account for a large share of employment in developing countries.The rapid expansion of microfinance services is based on the belief that these firms haveproductive investment opportunities and can enjoy high returns to capital if given theopportunity...