LLAW6093B Chap.3 Market Failures and the Goals of Regulation
Market Failures and the Goals of Regulation
A cautious default, and a three-stage test
The reading behind this chapter begins by refusing to assume that regulation helps. Where markets work, prices allocate resources without a central plan, and intervention can do harm. Finance is prone to failure because the results of a transaction often appear only years later.
Even so, a failure only opens the question: the reading's design process asks how serious the failure is, which combination of interventions could address it, and whether their costs and side effects are worth the benefit.
Efficiency, and why fairness is a separate question
The benchmark is an efficient market, in which resources are produced cheaply, go to those who value them most and are allocated sensibly over time.
An outcome can meet that benchmark and still be very unequal, so the reading treats fairness, especially protection of vulnerable users, as a separate reason for intervention.
Five ways markets go wrong
Sellers of financial products usually know far more than buyers, and many products are credence goods whose quality cannot be checked even afterwards.
One firm's collapse can damage others through the payment system, lost lending relationships and runs, and nobody can bargain that harm away in advance. Some goods, such as a working payment system, benefit people who never paid for them. A few large providers can dominate a market.
And people make predictable mistakes that sellers can exploit, which pushes regulation towards shaping what customers ought to want.
Goals and the conflicts between them
Each regulatory goal is tied to a failure: protecting investors and other users, protecting retail consumers, financial stability, informational efficiency of markets, competition, and preventing financial crime in the narrow sense of stopping the system being used for harmful ends.
The goals conflict. Restrictions that protect users can herd capital into the same assets, bans on short selling can stop prices correcting, and competition can erode the profits that make banks careful. The reading estimates that the stakes of stability in a mature system dwarf those of the other goals, and argues that an agency with a view of the whole system should own the trade-off.
What this chapter covers
- 01
The default against intervention
- 02
Productive, allocative and dynamic efficiency
- 03
Information gaps and credence goods
- 04
Spillovers, runs and the limits of bargaining
- 05
Public goods and market power
- 06
Behavioural errors and paternalism
- 07
Regulatory goals and the failures behind them
- 08
Who decides when goals collide
Worked example · free
Diagnose before you prescribe
- 2Rule out a pure information problem.
- 3Identify the failure the facts point to.
- 3State the remedy family and its justification burden.
Key terms
- Credence Good
- A product whose quality the buyer cannot verify even after using it, so it must be taken on trust; many financial products fall into this class.
- Negative Externality
- A cost that one party's action imposes on others without being charged for it, such as losses spreading from a failed bank.
- Public Good
- A good whose benefits reach people whether or not they pay, so private markets provide too little of it.
- Objective Function
- The framework a regulator uses to resolve conflicts between its goals by weighing their relative stakes.
- Informational Efficiency
- The speed and accuracy with which market prices reflect new information, which is what regulators usually mean by efficient markets.
- Pareto Optimality
- An allocation in which any change that benefits one person would harm another; it says nothing about fairness.
- Adverse Selection
- The drift towards poor-quality products that occurs when buyers cannot tell good from bad and pay only an average price.
Market Failures and the Goals of Regulation FAQ
Does a market failure automatically justify regulation?
No. The reading treats it as a starting point only. A regulator must also find an intervention that addresses the failure and show that its costs and side effects do not outweigh the benefit; otherwise a different remedy, or none, may be the right answer.
Why can the banks and investors affected by systemic risk not simply bargain it away?
Because there are too many of them, they are too dispersed, and they cannot identify in advance which institution will cause the harm. Where bargaining costs are that high, the outcome depends on public intervention through taxes, subsidies or regulation.
Why do financial regulation goals conflict?
Because tools aimed at one goal have side effects on another. Protecting users by restricting what they may buy can make everyone hold the same assets, which hurts stability, and more competition can reduce the profits that discourage banks from taking excessive risk.
Exam move
Make a two-column card with the failures on one side and a real product or event for each on the other. Test yourself by covering one column. When you can supply an example for every failure from memory, move on to matching goals.
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