Ronald Coase
Citation: For his discovery and clarification of the significance of transaction costs and property rights for the institutional structure and functioning of the economy.
The key idea
Transaction costs are everything. The Coase Theorem: with well-defined property rights and zero transaction costs, externalities are resolved by private bargaining regardless of initial allocation. The Nature of the Firm: firms exist because internal coordination has lower transaction costs than market exchange.
The explanation
Coase's 1937 'Nature of the Firm' explained why firms (rather than spot-market contracts) exist: management within a firm avoids the transaction costs of negotiating each input on the market. His 1960 'Problem of Social Cost' showed that, absent transaction costs, externalities self-resolve through bargaining — so policy should focus on minimising transaction costs and clarifying property rights, not on Pigouvian taxes.
Why Africa should care
Coase's framework is the cleanest analytical lens for African land-tenure reform: where property rights are clear (title), markets work; where they are murky (customary tenure, slum settlements), transaction costs prevent productive use. Kenya's digital land registry is a Coasean reform. The same logic applies to water rights, intellectual property, and pollution permits across the continent.
How to use it
When evaluating any economic dysfunction, ask first: what is the property-rights configuration, and what are the transaction costs of trading them? Most 'externality problems' dissolve once these are clarified.
Canonical works
- Ronald H. Coase (1937) "The Nature of the Firm" Economica
- Ronald H. Coase (1960) "The Problem of Social Cost" Journal of Law and Economics
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