Moral hazard

Moral hazard is an economic concept describing the tendency of parties protected from risk to behave differently than they would if fully exposed to that risk, typically taking greater risks because the negative consequences are borne partly or wholly by others (Arrow K.J. 1963, p.961)^[1]. The person with comprehensive car insurance drives more recklessly because crashes hurt less financially. The bank holding implicit government guarantees makes risky loans because taxpayers will absorb losses. The employee with guaranteed salary performs less diligently than the commission-based salesperson. In each case, transferring risk changes behavior.

English insurance companies used the term as early as the 17th century, initially with connotations of fraud or immoral character. Modern economists, beginning with Kenneth Arrow in the 1960s, stripped away the moral judgment. The term now describes rational responses to incentives—when you're protected from downside consequences, taking more risk becomes sensible. The challenge for contract designers is creating arrangements that align incentives despite risk transfer.

Mechanism

Moral hazard operates through predictable dynamics:

Information asymmetry

Hidden action. Moral hazard requires that one party cannot fully observe the other's behavior. The insurance company cannot watch every driver; the employer cannot monitor every employee's effort^[2].

Post-contractual. Unlike adverse selection, which occurs before contracts are signed, moral hazard emerges after the agreement when protected parties change behavior.

Incentive misalignment

Divergent interests. The risk-bearer wants cautious behavior; the protected party may prefer risk-taking because they capture gains while others absorb losses.

Rational response. Moral hazard isn't irrational or immoral—it's a logical response to incentives that separate risk from reward^[3].

Insurance context

Moral hazard is most studied in insurance:

Reduced precaution

Less prevention. Insured parties invest less in loss prevention. Why install an expensive alarm system when theft insurance will cover losses anyway?

Riskier behavior. Full health insurance may reduce incentives for healthy living. Flood insurance may encourage building in flood-prone areas^[4].

Ex-ante versus ex-post

Ex-ante moral hazard. Changed behavior before any loss occurs—driving faster because you have insurance.

Ex-post moral hazard. Changed behavior after a loss—seeking more expensive medical treatment than necessary because insurance pays.

Financial sector

Moral hazard shapes financial markets:

Too big to fail

Implicit guarantees. When banks believe governments will bail them out, they take excessive risks. If bets pay off, shareholders profit; if bets fail, taxpayers cover losses^[5].

2008 crisis. The financial crisis demonstrated moral hazard's consequences when institutions took risks under implicit government protection.

Deposit insurance

Protected depositors. Deposit insurance prevents bank runs but may reduce depositor scrutiny of bank risk-taking.

Regulatory response. Capital requirements and supervision attempt to offset moral hazard created by deposit insurance.

Employment

Workplaces exhibit moral hazard:

Shirking. Employees protected by contracts or difficulty of monitoring may exert less effort than self-employed workers.

Fixed compensation. Guaranteed salaries provide income security but may reduce performance incentives compared to variable pay^[6].

Solutions

Various mechanisms address moral hazard:

Deductibles

Shared losses. Requiring the protected party to bear initial losses creates skin in the game. A $500 deductible means the insured cares about small losses.

Co-insurance

Percentage sharing. Having the protected party pay a percentage of all losses maintains incentives throughout. Health insurance might cover 80% while the patient pays 20%^[7].

Monitoring

Observation. Direct monitoring of behavior can detect and deter moral hazard, though monitoring costs limit this approach.

Incentive alignment

Variable compensation. Tying pay to performance aligns employee and employer interests.

Clawback provisions. Recovering bonuses when risky decisions eventually fail addresses delayed consequences.

Moral hazard versus adverse selection

The concepts are related but distinct:

Adverse selection. Hidden information before contracting—sick people buy more health insurance because they know their health status.

Moral hazard. Hidden action after contracting—people with health insurance take fewer precautions because they're protected^[8].

Both involve asymmetry. Adverse selection involves asymmetric information; moral hazard involves asymmetric observation of behavior.

Moral hazard — recommended articles

Adverse selection — Information asymmetry — Risk management — Insurance

References

• Arrow K.J. (1963), Uncertainty and the Welfare Economics of Medical Care, American Economic Review, 53(5), pp.941-973.
• Holmström B. (1979), Moral Hazard and Observability, Bell Journal of Economics, 10(1), pp.74-91.
• Shavell S. (1979), On Moral Hazard and Insurance, Quarterly Journal of Economics, 93(4), pp.541-562.
• Dembe A.E., Boden L.I. (2000), Moral Hazard: A Question of Morality?, New Solutions, 10(3), pp.257-279.

Footnotes

1. ↑ Arrow K.J. (1963), Uncertainty and Welfare Economics, p.961
2. ↑ Holmström B. (1979), Moral Hazard and Observability, pp.76-82
3. ↑ Shavell S. (1979), Moral Hazard and Insurance, pp.545-550
4. ↑ Dembe A.E., Boden L.I. (2000), Moral Hazard, pp.262-268
5. ↑ Arrow K.J. (1963), Uncertainty and Welfare Economics, pp.965-970
6. ↑ Holmström B. (1979), Moral Hazard and Observability, pp.84-88
7. ↑ Shavell S. (1979), Moral Hazard and Insurance, pp.555-560
8. ↑ Dembe A.E., Boden L.I. (2000), Moral Hazard, pp.270-275

Author: Sławomir Wawak