My interest had been in a broad class of situations, broader than the advanced industrial market economies, including situations in third world count… - Leonid Hurwicz

Since I shall be indicating my disagreement with some of the points made by Professor Israel Kirzner, let me stress that I am in complete sympathy with his point of departure, namely, the emphasis on the dispersion of information among economic decision-making units (called by him, "Hayek's knowledge problem") and the consequent problem of transmission of information among those units. Much of my own research work since the 1950s has been focused on issues in welfare economics viewed from an informational perspective. The ideas of Hayek (whose classes at the London School of Economics I attended during the academic year 1938-39) have played a major role in influencing my thinking and have been so acknowledged.

My work in this area started around 1950 when I was still with the . I was writing a more or less expository paper dealing with activity analysis…and happened to use the term “decentralization,” which was then often applied to the market mechanism as a sort of a selling point. But when I used the word “decentralization” I thought I should explain what I meant. So I made a footnote mark, went to the bottom of the page, and began writing, “By decentralization we mean…” But then it struck me that I did not know what we meant by decentralization. That was the beginning of many years of work trying to clarify the concept, because I thought that if we think this property is so important, we should be able to define what it is.

Traditionally, economic analysis treats the economic system as one of the givens. The term "design" in the title is meant to stress that the structure of the economic system is to be regarded as an unknown. An unknown in what problem? Typically that of finding a system that would be, in a sense to be specified, superior to the existing one. The idea of searching for a better system is at least as ancient as Plato’s Republic, but it is only recently that tools have become available for a systematic, analytical approach to such search procedures. This new approach refuses to accept the institutional status quo of a particular time and place as the only legitimate object of interest and yet recognizes constraints that disqualify naive Utopias.