Consumption, production, and investment decisions of individuals, households, and firms often affect people not directly involved in the transactions. Sometimes these indirect effects are tiny. But when they are large they can become problematic—what economists call externalities. Externalities are among the main reasons governments intervene in the economic sphere.
Most externalities fall into the category of so-called technical externalities; that is, the indirect effects have an impact on the consumption and production opportunities of others, but the price of the product does not take those externalities into account. As a result, there are differences between private returns or costs and the returns or costs to society as a whole.
In the case of pollution—the traditional example of a negative externality—a polluter makes decisions based only on the direct cost of and profit opportunity from production and does not consider the indirect costs to those harmed by the pollution. The indirect costs include decreased quality of life, say in the case of a homeowner near a smokestack; higher health care costs; and forgone production opportunities, for example, when pollution harms activities such as tourism. Since the indirect costs are not borne by the producer, and therefore not passed on to the end user of the goods produced by the polluter, the social or total costs of production are larger than the private costs.
The primary purpose of the passage is to:
A. Criticize the role of businesses in creating externalities and suggest ways to mitigate them.
B. Explain the concept of externalities and how they justify government intervention in economic activities.
C. Propose a framework for understanding the impact of government policies on private businesses.
D. Analyze the trade-offs between private profit maximization and societal welfare in market transactions.
E. Compare different types of externalities and their respective impact on economic production and consumption.