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April 10, 2026
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"Itâs true that my initial training was in mathematics. However, almost by accident, I happened to take a course from Kenneth Arrow on âInformation Economics,â which was so inspiring that I decided to change direction. It seemed to me that economics combined the best of both worlds: the rigor of mathematics with the immediate relevance of a social science. As for how much math I would recommend, Iâd say that basic analysis, including , is certainly very useful. Also, and always helps. But beyond that, I donât think a huge mathematical investment is necessary to do economic theory unless you are planning to work in an extremely technical area."
"How could such industries as software, semiconductors, and computers have been so innovative despite historically weak patent protection? We argue that if innovation is both sequential and complementaryâas it certainly has been in those industriesâcompetition can increase firmsâ future profits thus offsetting short-term dissipation of rents. A simple model also shows that in such a dynamic industry, patent protection may reduce overall innovation and social welfare. The natural experiment that occurred when patent protection was extended to software in the 1980's provides a test of this model. Standard arguments would predict that R&D intensity and productivity should have increased among patenting firms."
"After society has decided on a social choice rule-a recipe for choosing the optimal social alternative (or alternatives) on the basis of individuals' preferences over the set of all social alternatives-the social planner still faces the problem of how to implement that rule. In particular, the planner may not know individuals' preferences. He might attempt to elicit them, but this may not be an easy task, even abstracting from communication costs. If individuals know the rule by which the planner selects alternatives on the basis of reported preferences, they may have an incentive to report falsely."
"We investigate how the degree to which credit markets are centralized affects efficiency when there is asymmetric information. Specifically, we argue that decentralization of credit may promote efficient project selection when creditors are not fully informed ex ante about project quality. Our starting point is the idea that, although an entrepreneur (project manager) may have a relatively good idea of her project's quality from the outset, creditors acquire this information only later on, by which time the criteria for profitability may have changed. Thus, a poor project (one whose completion time is too long to be profitable ex ante) may nevertheless be financed, since a creditor cannot distinguish it at the time from a good (quick) project."
"That strategic rivalry in a long-term relationship may differ from that of a one-shot game is by now quite a familiar idea. Repeated play allows players to respond to each otherâs actions, and so each player must consider the reactions of his opponents in making his decision. The fear of retaliation may thus lead to outcomes that otherwise would not occur. The most dramatic expression of this phenomenon is the celebrated "Folk Theorem." An outcome that Pareto dominates the minimax point is called individually rational. The Folk Theorem asserts that any individually rational outcome can arise as a in infinitely repeated games with sufficiently little discounting."
"Hurwicz talked in 1949 about the need to model strategic behavior. He said that Keynesian models were ignoring the fact that individuals aren't just stupid players who responded passively to what the government did, but that they had the option to change their strategy when the government changed its strategy. That's the rational expectations program. He was ignored for 20 years or more."
"There were times when other people said I was on the short list, but as time passed and nothing happened, I didnât expect the recognition would come because people who were familiar with my work were slowly dying off."
"My interest had been in a broad class of situations, broader than the advanced industrial market economies, including situations in third world countries, and in countries attempting to have some kind of socialist approach to their problems. I have been interested in how one can construct efficient mechanisms that have the decentralization features similar to a market but that do not necessarily resemble a market. For this purpose, I formulated the notion of an informationally-decentralized economy in which perfect competition was just a very special case..."
"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 analysisâŚand happened to use the term âdecentralization,â which was then often applied to the market mechanism as a sort of a selling point. But when I used the word âdecentralizationâ I thought I should explain what I meant. So I made a footnote mark, went to the bottom of the page, and began writing, âBy decentralization we meanâŚâ 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."
"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."
"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 ďŹnding a system that would be, in a sense to be speciďŹed, superior to the existing one. The idea of searching for a better system is at least as ancient as Platoâs 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."
"Had it merely called to our attention the existence and exact nature of certain fundamental gaps in economic theory, the Theory of Economic Behavior by von Neumann and Morgenstern would have been a book of outstanding importance. But it does more than that. It is essentially constructive: where existing theory is considered to be inadequate, the authors put in its place a highly novel analytical apparatus designed to cope with the problem. It would be doing the authors an injustice to say that theirs is a contribution to economics only. The scope of the book is much broader. The techniques applied by the authors in tackling economic problems are of sufficient generality to be valid in political science, sociology, or even military strategy. The applicability to games proper (chess and poker) is obvious from the title. Moreover, the book is of considerable interest from a purely mathematical point of view."
"The basic point is that economies are very complex â there are millions of actors â and to understand how they will respond to some change is extremely challenging,â says n. âHis contribution, building in part on the work of others, was developing a manageable way of representing economies and how they would change with different kinds of policy changes.â"
"It is my firm belief that the only satisfactory test of economics is the ability to predict, and in crucial predictive situations such as reconversion after World War II, the settlement of the Korean War, the settlement of the Vietnam War, the abrupt economic policy switch of the Nixon Administration in August 1972, the oil shock of 1973 (forecast of a world-wide succession by LINK), the recession of 1990. In these crucial periods, econometric models outperformed other approaches, yet there is considerable room for improvement, and that is precisely what is being examined in development of high-frequency models that aim to forecast the economy, every week, every fortnight, or every month, depending on the degree of fineness of the information flow."
"I have always believed that people have misjudged the accuracy of economic forecasting... During the 1980s and 1990s, I researched and applied methods of high frequency economic forecasting, to be used by themselves, and for objective establishment of initial conditions for longer range forecasts from structural dynamic models that carry forward the pioneering contributions of Jan Tinbergen."
"At Chicago, I was in the midst of a veritable galaxy of stars: Trygve Haavelmo, Tjalling Koopmans, Theodore Anderson, Leonid Hurwicz, Herman Rubin, Kenneth Arrow, , , and Herbert Simon, among others. I completed my first of a series of macroeconometric models, solidified my understanding of econometrics, learned (through endless discussion) about the functioning of the economy, and got started on several theoretical paths such as aggregation, demand systems, and prediction."
"Although I was not aware of it at the time, the experience of growing up during the Great Depression was to have a profound impact on my intellectual and professional career."
"The centrally planned economies, dissatisfied with the outcome of their own efforts to achieve good economic growth performance, have changed strategy and decided to import high technology from the West. as well as necessary grains to supplement their domestic agicultural supplies. This new approach has opened their economies to Western inflation because imports have been reflecting rising world price. Gold and oil sales at correspondingly rising prices have been used by the Soviet Union to finance part of their import needs. but they are fully enmeshed in world inflation accounting in balancing rising export prices."
"The centrally planned economics used to consider themselves well insulated against the economic ills of the rest of the world. This is no longer the case."
"At the beginning of a decade it is tempting to look ahead for the next ten years."
"You can lead a horse to water, but you cannot make him drink. Or monetary policy is pulling on a string when the economy is strong. That works. But when the economy is weak and you are cutting interest rates, it can be like pushing on a string. It does not work as well."
"I believe that monetary policy has a chronic defect. It is asymmetricâit works better in restraining an economy than in stimulating an economy."
"Balancing fiscal and monetary policies is a problem. If you do just one thing, it is not necessarily enoughâneither monetary policy alone nor fiscal policy alone, and neither tax cuts nor expenditure increases alone. You need to mix policy. By having the right balance, you can get high employment and stable prices."
"There are many reasons there was higher inflation in the 1970s. But that is a complicated story that deals with much more than tax policies."
"I think the Kennedy-Johnson tax cut was a marvelous success in 1964. It was too bad it was not implemented a little sooner, and Kennedy died, of course. After that, Johnson dallied for a while about raising taxes to pay for the war in Vietnam. The stimulus did not get reversed until the tax increase and expenditure cap of 1969, and that had a quick effect once it was enacted. As you know, we had a recession in 1969â1970."
"People say monetary policy is easy and quick to implement. It can even be done overnight on the telephone, they say fiscal policy drags out in political and congressional debate in our country. It might take months to implement. But the point is that once fiscal policy is implemented, it might go to work much faster than monetary policy."
"From Keynes' point of view the economic system, before the war failed in its solution of the unemployment problem"
"In the past few years there has grown up a large group of young economists who have accepted the theoretical doctrines of the Keynesian Revolution and who have come into national prominence through their support of an economic policy of full employment."
"The element that people don't consider is that a friendship is about the only relationship we experience that is mutually voluntary. It is not really bound by family, money, or jobs. It is only bound by inclination. Once that is gone. It is gone. It feels powerful⌠it's not. It is delicate."
"It's funny how we imagine that lifelong relationships have to be build on a mountain top of moments, so huge they're written across the sky in letters a mile wide. But I knew a skywriter once and he told me the letters are just strategically placed puffs of smoke that are easily blown away. In reality, a life together is made of the simplest, smallest things."
"Marriage isnât about the good days. Anyone can make a life with anyone else when you are having a good day. Marriage is about the bad days. When you have lost confidence. When you have been hurt. Or failed. Or gotten angry. Or made a terrible mistake. That is when the power of a marriage reveals itself."
"[âŚ] it seems like people make the mistake of thinking love is about the bedroom. It's not. It's about the emergency room. Love and marriage is who will sit there and wait."
"My son Robert, the scientist, told me at dinner that blue is not blue. That what we call blue is actually something that absorbs all other energy frequencies and rejects blue. Our eyes see the frequencies cast off as blue and we call it blue. I wondered, are we defined by the things we are, or the things we reject?"
"The inescapable conclusion is that the direct contribution of man-hours and capital accumulation would hardly account for more than a tenth of the rate of growth in per capita product â and probably less. The large remainder must be assigned to an increase in efficiency in the productive resources, or the effects of changing arrangements, or to the impact of technological change, or to all three"
"[The principal characteristic of this economic epoch is] a sustained increase in per capita or per worker product, most often accompanied by an increase in population and usually sweeping structural changes."
"The paper is perhaps 5 per cent empirical information and 95 per cent speculation, some of it possibly tainted by wishful thinking. The excuse for building an elaborate structure on such a shaky foundation is a deep interest in the subject and a wish to share it with members of the Association. The formal and no less genuine excuse is that the subject is central to much of economic analysis and thinking; that our knowledge of it is inadequate; that a more cogent view of the whole field may help channel our interests and work in intellectually profitable directions; that speculation is an effective way of presenting a broad view of the field; and that so long as it is recognized as a collection of hunches calling for further investigation rather than a set of fully tested conclusions, little harm and much good may result"
"The very fact that after a while, an increasing proportion of the urban population was "native," i.e., born in cities rather than in the rural areas, and hence more able to take advantage of the possibilities of city life in preparation for the economic struggle, meant a better chance for organization and adaptation, a better basis for securing greater income shares than was possible for the newly "immigrant" population coming from the countryside or from abroad"
"The rural and urban populations does not necessarily drift downward in the process of economic growth: indeed, there is some evidence to suggest that it is stable at best, and tends to widen because per capita productivity in urban pursuits increases more rapidly than in agriculture."
"An invariable accompaniment of growth in developed countries is the shift away from agriculture, a process usually referred to as industrialization and urbanization. The income distribution of the total population, in the simplest model, may therefore be viewed as a combination of the income distributions of the rural and of the urban populations. What little we know of the structures of these two component income distributions reveals that: (a) the average per capita income of the rural population is usually lower than that of the urban;' (b) inequality in the percentage shares within the distribution for the rural population is somewhat narrower than in that for the urban population... Operating with this simple model, what conclusions do we reach? First, all other conditions being equal, the increasing weight of urban population means an increasing share for the more unequal of the two component distributions. Second, the relative difference in per capita income between the rural and urban populations does not necessarily drift downward in the process of economic growth: indeed, there is some evidence to suggest that it is stable at best, and tends to widen because per capita productivity in urban pursuits increases more rapidly than in agriculture. If this is so, inequality in the total income distribution should increase"
"The central theme of this paper is the character and causes of long-term changes in the personal distribution of income. Does inequality in the distribution of income increase or decrease in the course of a country's economic growth? What factors determine the secular level and trends of income inequalities?"
"we need far more empirical study than we have had so far of the universe of inventors; any finding concerning inventors... would be of great value... for public policy in regard to inventive activity."
"The welfare of a nation can scarcely be inferred from a measurement of national income."
"Distinctions must be kept in mind between quantity and quality of growth, between its costs and return, and between the short and the long term. Goals for more growth should specify more growth of what and for what."
"Simon Kuznets is best known for his studies of national income and its components. Prior to World War I, measures of GNP were rough guesses, at best. No government agency collected data to compute GNP, and no private economic researcher did so systematically, either. Kuznets changed all that. With work that began in the 1930s and stretched over decades, Kuznets computed national income back to 1869. He broke it down by industry, by final product, and by use. He also measured the distribution of income between rich and poor."
"GDP! The right concept of economy-wide output, accurately measured. The U.S. and the world rely on it to tell where we are in the business cycle and to estimate long-run growth. It is the centerpiece of an elaborate and indispensable system of social accounting, the national income and product accounts. This is surely the signal innovative achievement of the Commerce Department in the 20th century. I was fortunate to become an economist in the 1930's when Kuznets, Nathan, Gilbert, and Jaszi were creating this most important set of economic time series. In economic theory, macroeconomics was just beginning at the same time. Complementary, these two innovations deserve much credit for the improved performance of the economy in the second half of the century."
"If the history of economics in the twentieth century were properly written, the two great figures associated with what has come to be called the Keynesian revolution would be John Maynard Keynes and Simon Kuznets. And this is a judgment in which Keynes would concur. Keynes showed in analytical terms the possibility of a shortage in aggregate demand and argued the means for its correction. But it remained for Simon Kuznets and his talented associates to put this in the quantitative terms that made it persuasive, indeed irresistible. The Keynesian argument could be resisted; the Kuznets figures could not."
"[An] epochal innovation [consisting of the] spreading application of science to processes of production and social organization."
"Great philosophical systems are never produced in a scientific vacuum but usually follow the formation and completion of a scientific world-perspective."
"Newtonian physics found its apostle in Kant; modern physics is still awaiting its modern expounder."
"As long as man has not ascended to the rank of existence where he leaves behind him the domain of the universal and enters into his own personal domain—no longer dependent upon the principles operative in the realm of the universal—he is still subject to the rule of the species and the universal form. However, as soon as he liberates himself from the burden of the species, he becomes a free man. Complete freedom belongs only to the prophet, the man of God. The man who is a mere random example of the species, on the other hand, is wholly under the rule of the scientific lawfulness of existence. Between this species man and the man of God, between necessity and freedom, is the middle range in which most people find themselves."