Francis Duffy begins this volume with an essay that details the fundamental concepts involved in labor economics. The primary elements of supply and demand as they pertain to goods and services can also be applied to labor economics to describe the relationship between workers and employers. As Duffy explains, “unemployment is a constant that varies only in degree and kind,” which is why unemployment rates can skyrocket and competition can increase for certain industries. While macroeconomics paints a broad picture of the supply and demand for certain goods, microeconomics helps employers determine how large a workforce they need and at what wage to pay its members. Simone I. Flynn follows with an analysis of the relationship between labor markets, labor supply and demand, labor force, and wage rates. However, despite the plethora of available labor statistics, a number of issues still remain in the forecasting of labor demand across industries.