Unemployment levels have received a great deal of attention and discussion in recent years. However, another labor category--underemployment--has virtually been ignored. Underutilized or underemployed workers are those who are experiencing inadequate hours of work, insufficient levels of income, and mismatch of occupation and skills. Marginal Workers, Marginal Jobs addresses two principal issues: how can we measure underemployment, and how can we explain its prevalence?

To answer the first question, Teresa Sullivan examines yardsticks in use, demonstrates their...