This 2006 book presents a unifying concept of the term institution.It is widely believed that current disparities in economic, political, and social outcomes reflect distinct institutions. Institutions are invoked to explain why some countries are rich and others poor, some democratic and others dictatorial. But arguments of this sort gloss over the question of what institutions are, how they come about, and why they persist. This book seeks to overcome these problems, which have exercised economists, sociologists, political scientists, and a host of other researchers who use the social sciences to study history, law, and business administration.It is widely believed that current disparities in economic, political, and social outcomes reflect distinct institutions. Institutions are invoked to explain why some countries are rich and others poor, some democratic and others dictatorial. But arguments of this sort gloss over the question of what institutions are, how they come about, and why they persist. This book seeks to overcome these problems, which have exercised economists, sociologists, political scientists, and a host of other researchers who use the social sciences to study history, law, and business administration.It is widely believed that current disparities in economic, political, and social outcomes reflect distinct institutions. Institutions are invoked to explain why some countries are rich and others poor, some democratic and others dictatorial. But arguments of this sort gloss over the question of what institutions are, how they come about, and why they persist. This book seeks to overcome these problems, which have exercised economists, sociologists, political scientists, and a host of other researchers who use the social sciences to study history, law, and business administration.Part I. Preliminaries: 1. Introduction; 2. Institutions and transactions; Part II. Institutions as Systems in Equilibria: 3. Private-order contract enforcement institutionsl“‘