. . . . . . "Pollution : how much is a clean environment worth? ; Labor and management : how do they come to terms?" . . . . . . "Part 1. Gives a definition of the concept of external diseconomy by illustrating how polluting the environment can adversely affect economic efficiency. Part 2. Explains how the demand for labor depends on the marginal value product and the real wage rate." . . . . . . . . .