Previous research has demonstrated that attending center care is associated with cognitive benefits for young children. However, little is known about the ideal age for children to enter such care or the "right" amount of time, both weekly and yearly, for children to attend center programs....

This article examines the impact of surplus schooling on individual productivity and earnings. It proposes a model that divides workers' education into two components: education that is required and thus fully utilized in the job, and education that exceeds the amount required and thus may be...

Using Census data and information from the Department of Labor on the skill requirements of jobs, two models were tested in order to evaluate changes in the position of workers between 1969 and 1975. The first model was based on workers' mean weekly earnings. The second model was based on the...