For each of the following projects, what benefits or costs might be included in a social cost-benefit analysis that might be excluded from a private cost-benefit analysis:

a. A hydroelectric project

b. A steel mill

c. A chemical plant

d. A project to improve car safety

e. A training program to improve the skills of minority workers in a firm

How might your answers be affected by changes in legislation (e.g., concerning manufacturers' liabilities for automobile accidents, legislation imposing fines on polluters)?