A procedure is examined for adjusting observed values of a sample of entities toward the overall sample mean. This procedure provides estimators with lower expected mean square errors than the ordinary least-squares estimators, at the cost of accepting a slight bias. The procedure was applied to...

We summarize the available evidence on the extent to which expenditures on early childhood education programs constitute worthy social investments in the human capital of children. We provide an overview of existing early childhood education programs, and then summarize results from a...