Market failure

Market failure does not mean that no market exists or that someone dislikes the outcome. It identifies a gap between an actual or modeled allocation and a declared benchmark. A mechanism such as an external effect, public-good problem, information asymmetry, or market power must explain that gap.

Diagnose before prescribing

State the market and benchmark. Identify the violated assumption and causal mechanism. Measure the affected margin and parties. Evaluate property rights, contracts, disclosure, standards, taxes, subsidies, provision, competition, liability, or other institutional alternatives.

Then examine implementation, enforcement, information, administrative cost, capture, unintended effects, and distribution. A market-failure diagnosis does not prove that one government intervention improves the outcome; government and organizational failures are comparison cases, not reasons to ignore the original problem.

Accounting records can reveal costs, obligations, contingencies, transactions, or disclosures relevant to the mechanism. They do not automatically measure the external or social value outside the reporting entity.

Diagnose the mechanism before choosing a remedy

For example, pollution can impose a cost on people outside a buyer-seller transaction. That observation identifies a candidate externality; it does not establish the size of harm or the best response. Define the market and affected parties, measure the missing cost or benefit, test rival explanations, and compare feasible institutions. Taxes, standards, bargaining rules, disclosure, public provision, and enforcement have different information and implementation demands. Preserve distribution, administrative cost, legal authority, and uncertainty as separate decision evidence.