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By the end of this section, you will be able to:

  • Explain how insurance works
  • Identify and evaluate various forms of government and social insurance
  • Discuss the problems caused by moral hazard and adverse selection
  • Analyze the impact of government regulation of insurance

Insurance is a method that households and firms use to prevent any single event from having a significant detrimental financial effect. Generally, households or firms with insurance make regular payments, called premiums . The insurance company prices these premiums based on the probability of certain events occurring among a pool of people. Members of the group who then suffer a specified bad experience receive payments from this pool of money.

Many people have several kinds of insurance: health insurance that pays when they receive medical care; car insurance that pays if they are the driver in an automobile accident; house or renter’s insurance that pays if possessions are stolen or damaged by fire; and life insurance, which pays for the family if the principal dies. [link] lists a set of insurance markets.

Some insurance markets
Type of Insurance Who Pays for It? It Pays Out When . . .
Health insurance Employers and individuals Medical expenses are incurred
Life insurance Employers and individuals Policyholder dies
Automobile insurance Individuals Car is damaged, stolen, or causes damage to others
Property and homeowner’s insurance Homeowners and renters Dwelling is damaged or burglarized
Liability insurance Firms and individuals An injury occurs for which you are partly responsible
Malpractice insurance Doctors, lawyers, and other professionals A poor quality of service is provided that causes harm to others

All insurance involves imperfect information in both an obvious way and in a deeper way. At an obvious level, future events cannot be predicted with certainty. For example, it cannot be known with certainty who will have a car accident, become ill, die, or have his home robbed in the next year. Imperfect information also applies to estimating the risk that something will happen to any individual. It is difficult for an insurance company to estimate the risk that, say, a particular 20-year-old male driver from New York City will have an accident, because even within that group, some drivers will drive more safely than others. Thus, adverse events occur out of a combination of people’s characteristics and choices that make the risks higher or lower and then the good or bad luck of what actually happens.

How insurance works

A simplified example of automobile insurance might work this way. Suppose that a group of 100 drivers can be divided into three groups. In a given year, 60 of those people have only a few door dings or chipped paint, which costs $100 each. Another 30 of the drivers have medium-sized accidents that cost an average of $1,000 in damages, and 10 of the drivers have large accidents that cost $15,000 in damages. For the moment, let’s imagine that at the beginning of any year, there is no way of identifying the drivers who are low-risk, medium-risk, or high-risk. The total damage incurred by car accidents in this group of 100 drivers will be $186,000, that is:

Questions & Answers

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Source:  OpenStax, Principles of economics. OpenStax CNX. Sep 19, 2014 Download for free at http://legacy.cnx.org/content/col11613/1.11
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