This book analyses the process by which the market was introduced into the economy of a group of Kenyan pastoralists.

1. A proper marriage: new institutional economic anthropology; 2. Transaction costs: the history of trade among the Orma; 3. Distribution of the gains from trade; 4. Agency theory: patron-client relations as a form of labor contracting; 5. Property rights: dismantling the commons; 6. Collective action: from community to state; 7. Conclusion: ideology and the economy.