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Alongside the private market, federal and state governments act as insurers in their own right, offering what is commonly called social insurance.
Government insurance programs generally serve one of two purposes: covering catastrophic perils that commercial insurers are unwilling to underwrite on their own — such as war, flood, or nuclear-related losses — or writing coverage on ordinary insurable risks in direct competition with, or in place of, the private market, as seen with many state workers' compensation funds.
Collectively, these programs pay out billions of dollars in benefits every year and touch the financial lives of millions of Americans, making government one of the largest insurers in the country by any measure.
The table below summarizes how each of the insurer types covered in this chapter is owned, whether it issues participating or nonparticipating coverage, and what makes it distinct.
| Insurer Type | Owned By | Policy Type | Distinctive Trait |
|---|---|---|---|
| Stock company | Shareholders | Nonparticipating | Operated to profit its shareholders |
| Mutual company | Policyowners | Participating | Policyowners may receive dividends from the divisible surplus |
| Fraternal benefit society | Members | Participating | Non-profit, lodge system, social/charitable mission |
| Reciprocal insurer | Subscribers | Participating | Members insure each other; run by an attorney-in-fact |
| Captive insurer | Parent company | Varies | Formed solely to insure its own parent's risk |
| Risk retention group (RRG) | Members | Participating | Pools liability risk among members with a common bond |
| Risk purchasing group (RPG) | Depends on underlying policy | Depends on underlying policy | Buys coverage from an insurer; does not act as the insurer |
| Reinsurer | N/A | Insurance for insurers | Assumes risk ceded by a primary insurer |
| Surplus lines carrier | N/A | Coverage for unusual/high risks | Non-admitted; fewer consumer protections |
| Lloyd's of London | N/A | Coverage placed by independent underwriters | A marketplace, not an insurance company |
| Industrial insurer | N/A | Small face-amount life insurance | Traditionally collects premium weekly, in person |