Top 54 Quotes & Sayings by Kenneth Arrow

My graduate study was interrupted, like that of many others, by World War II.

The major driver of economics is the equilibrium approach, which has taken various forms over the years. General equilibrium is the statement that all the different parts of the economy influence each other, even if it's remote, like mortgage-backed securities and their demands on automobiles.

My undergraduate education, at the City College in New York, was made possible only by the existence of that excellent free institution and the financial sacrifices of my parents.

Not every business cycle has a financial crisis. Frequently they do.

In 1963 and later papers, I pointed out that the special market characteristics of medical care and medical insurance could be explained by reference to differences in information among the parties involved.

Any purchase is one for the future. If you buy a refrigerator, you are making a commitment to the future so that you have food to eat for the next ten years.

My research, even before 1972, moved in directions beyond those cited for the Nobel Memorial Prize. Most of it, in one way or another, deals with information as an economic variable, both as to its production and as to its use.

My assignment was exclusively in the research field, and my first published paper, On the Optimal Use of Winds for Flight Planning, was the outgrowth of that work.

I was graduated in 1940 with a degree of Bachelor of Science in Social Science but a major in Mathematics, a paradoxical combination that was prognostic of my future interests.

That economic decisions are made without certain knowledge of the consequences is pretty self-evident. But, although many economists were aware of this elementary fact, there was no systematic analysis of economic uncertainty until about 1950.

One way of looking at Impossibility Theorem is that we proposed some criteria for what a good system should be: what is it you want from a voting system, and impose some conditions. And then ask: can you have a voting system that guarantees that?

There are all sorts of institutions in the economic world which depart from the simple price/market model which I worked on in an earlier incarnation and which has been sort of the mainstream of economic theories since Adam Smith and David Ricardo. There are all sorts of contractual relations between firms and individuals which do not conform to the simple price theory - profit-sharing schemes and so forth - and the explanation for these suddenly became clear. We now understand why these emerged and that they are based on differences in information in the economy.

You will vote for first choice candidate whether or not you think he'll win. But I'm saying you may find yourself for a candidate, a middling candidate, a candidate you don't think very well of, really. And you really don't like to avoid a catastrophe. Well, maybe that's a good thing. You can argue that back and forth.

It seems to me that at least as far as the financial markets are concerned, there is increasing evidence against rational expectations, even at the macro level.

Vast ills have followed a belief in certainty.

One doesn't like instabilities in markets; they may be damaging, but probably not fatal, as the October '87 crash showed. It turned out to be essentially inconsequential. So if that's true, I'm not very worried about the welfare of those who are investing any more than I am about the welfare of those who go into casinos.

Now virtue may not always be its own reward, but in any case it is not usually bought and paid for at market rates.

Venture capital has done much more, I think, to improve efficiency than anything.

In my [Impossibility] theorem I'm assuming that the information is a ranking. Each voter can say of any two candidates, I prefer this one to this one. So then we have essentially a ranking. It's a list saying this is my first choice. This is my second choice. Each voter, in principle, could be asked to give that entire piece of information. In the ordinary Plurality Voting, say as used in electing Congressmen, we generally only ask for the first choice. But, in principle, we could ask for more choices.

The intrinsic social structure, the family structure and so forth, is certainly in a very bad state. And I think that this is showing up in productivity. I think part of the reason, and I can't prove this, we're seeing a decline in some places is the breakup of the family, which is partly the result of an extreme form of individualism.

In The United States, the only real change I know has been Instant Runoff, which is usually applied to municipal elections. I see no real improvement. There's another aspect which comes out of the two-party system, which the primary, a funny kind of two-stage election. And people certainly have complained.

The MD is well aware that the forecasts are no good but he needs them for planning purposes.

One thing I learned from meteorology is that being an actual science was no guarantee of exactness.

The health care provisions are presumably for individuals. And whoever pays for them, whether it's paid by the individual, state, whatever, the value is an individually based value. It has nothing to do with employment.

I think the development of the venture capital system has been an example of something which is a successful improvement in risk-bearing. It doesn't exactly remove the risks at the beginning, but at least creates greater rewards at a slightly later stage and therefore encourages, say, small companies to engage in technologically risky enterprises.

The general uncertainty about the prospects of medical treatment is socially handled by rigid entry requirements. These are designed to reduce the uncertainty in the mind of the consumer as to the quality insofar as this is possible. I think this explanation, which is perhaps the naive one, is much more tenable than any idea of a monopoly seeking to increase incomes.

The rate of growth of the relevant population is much greater than the rate of growth in funds, though funds have gone up very nicely. But we have been producing students at a rapid rate; they're competing for funds and therefore they're more frustrated. I think there's a certain sense of weariness in the intellectual realm, it's not in any way peculiar to economics, it's a general proposition.

From the time I first understood economic principles, I was always concerned also that any system be operated on an efficient basis, which meant decentralization because knowledge is not concentrated anywhere. It's based on motivation, and so these are the advantages of, say, the cautious case for capitalism, that the market system is efficient.

I think that systems that are based on employment are illogical and attempts to meet them create all sorts of unnecessary complexities.

Some people say Russia is running at 50 percent of its gross domestic product under that during the Communist period. In fact, none of the countries seems to have recovered the level that they had under communism, although the other countries in Eastern Europe are doing better than Russia and particularly the Czech Republic seems to be doing modestly well. East Germany I can't count because they have a rich uncle. You have economic benefits which have nothing to do with the workings of the system.

We have to be more modest in what we claim.

Unsolved problems, that's one of the great signs of progress in my opinion.

I think the idea that a society has to be responsible for all of its citizens, those who do well and those who do not, is really a precondition of a good society.

The Germans, for example, have some kind of compromise between single-member and broader districts. In Israel, you have nothing, you have only a national election. You have no local districts at all. And that's because of the idea that in addition to other ideological differences, locality matters. The question is does the congressman represent his district and the interests of his district? And as I said there's quite a variety of systems the democratic world. The implications need to be examined.

There's only one problem that bothers me. And that's something my theorem [ of Impossibility] really doesn't cover. In my theorem I was assuming people vote sincerely. The trouble with methods where you have three or four classes, I think if people vote sincerely they may well be very satisfactory. The problem is the incentive to misrepresent your vote may be high.

There is a bit of a problem with the match between derivative securities markets and the primary markets. We have long ago instituted principles, essentially high margin requirements, to prevent certain instabilities in the stock market, and I think they're basically correct. The trouble is that there's a linkage, let's say, between something like the stock market and the index futures markets, and the fact that the margin requirements are very different, for example, played some role in the October '87 crash.

I think one of the things we learned from the physicists and also the theoretical biologists is the idea that when you're dealing with very complex systems you're going to get a large variety of behavior which can be interpreted as hill climbing, but hill climbing with a lot of modifications, hill climbing with big jumps occasionally.

The switch to the market in Eastern Europe, of course, has not exactly been one of the greatest advertisements for the market. There's no question the socialist system - and I hate to use the word 'socialist,' but I suppose some description of a system in which the state is in control - was breaking down, really collapsing. In these countries, most markedly in Russia itself and in a number of the others, it obviously was based on a tyranny, which is unacceptable even if it were producing good economic results, which it was not.

Family is a difficult matter. I must admit I do not know that the state can intervene successfully in a family. It's a fact that everything is connected with the individualist temperament, the kind of economic environment which stresses the individual, but this is not directly the result of a state policy, nor do I see any good way by which the state could intervene except in some marginal ways.

Markets are not, in my opinion, a full solution to any problem. The obvious problem they don't meet is the concerns of the welfare of individuals who may get lost in the operation of the system - the distributional question. We've seen this growing as we go further and further toward a market ideology in the United States and the United Kingdom. We've seen a decline in the welfare of the working poor, leaving aside any other pathologies, just the working poor, a very distinct increase at the very top levels.

Usefulness depends on tractability.

The trouble is that the risks that are being hedged very well by new financial securities are financial risks. And it appears to me that the real things you want to hedge are real risks, for example, risks in innovation. The fact is that you'd like companies to be able to take bigger chances. Presumably one obstacle to successful R&D, particularly when the costs are large, are the risks involved.

Education is still, in spite of private education, a state matter.

Classic economic theories recognize public goods aspects of one kind or another - the need for economic intervention in, obviously, the supply of infrastructure and of education. We're not supplying that infrastructure at an appropriate rate today. I don't doubt it isn't just money; it's organization and goals and so forth.

I'm struck by the fact that by and large equity capital doesn't play a big role in new financing; it's either bonds or internal financing but not really equity. And therefore, it's not clear that anything which improves the equity markets has really much to do with the productivity of the economy as a whole.

I am not really inclined to think there is any very effective regulation of the derivative securities markets that would be useful. People who go into it essentially ought to know what risks they're taking and I don't see any useful regulation.

Economics in college was very poor; I was not very impressed with it. I actually wanted to study statistics. I discovered mathematical statistics as an undergraduate and was fascinated with it.

The world is changing. We're not really proceeding on a stationary basis.

I don't believe that unemployment is all voluntary, by anticipation of future wage movements or this sort of thing. I know you can modify the models by taking into account the indivisibilities, but I don't really think that people are voluntarily unemployed.

Knowledge is a free good. The biggest cost in its transmission is not in the production or distribution of knowledge, but in its assimilation. This is something that all teachers know.

Evolutionary theory tends to explain quite well in retrospect how various species emerged. It's not very good on prediction. Nevertheless, one cannot say that there isn't a lot of knowledge that's been obtained in this field. In the same way, with these complex physical phenomena between solid state physics, you can say a lot of things without necessarily knowing the next step.

When you look at any experimental work not directly related to economics, but trying to test rational behavior in other ways, experiments have conspicuously failed to show rational behavior. Macro evidence certainly suggests deviations from rationality, but I don't want to say the rationality hypothesis is completely wrong. If you have any introspective idea or experimental idea about people's behavior, it seems to be incompatible with the really full scale rational expectations.

I think on the efficiency level, not only the distribution level, capitalism is a flawed system. It probably has the same virtues as Churchill attributed to democracy: It's the worst system except for any other. And I think that's right, but it cannot be thought that some unmitigated belief in free markets is a cure even from the efficiency point of view.

I do sense, as compared with let's say the early '50s, there's somewhat more of a careerism. I don't think it's anything special to economics; it's equally true with physics or biology. A graduate education has become a more career-oriented thing, and part of that is because of the need for funding. In fact, that's a much worse problem in the natural sciences than it is in economics. So you can't even do your work in the natural sciences, particularly, and even to some extent in economics, without funding.