Human capital studies do not usually consider whether an individual is
paid an hourly wage or a salary. The authors of this paper develop a
conceptual framework that explains why some workers are paid salaries
and predicts that salaried workers will invest more in human capital t
han will hourly workers. In particular, this prediction hinges on the
differing effort incentives facing hourly and salaried workers, and th
eir employers, in jobs that are paced versus unpaced. Empirical eviden
ce supporting this prediction and other hypotheses implied by the prop
osed framework is presented using data on individuals covering a 16-mo
nth period in 1984-85 from the Bureau of Census Survey of Income and P
rogram Participation (SIPP), a longitudinal survey.