Standard economic theories of saving implicitly assume that households have the cognitive ability to solve the relevant optimization problem and the willpower to execute the optimal plan. Both of the implicit assumptions are suspect. Even among economists, few spend much time calculating a...

The average nominal share prices of common stocks traded on the New York Stock Exchange have remained constant at approximately $35 per share since the Great Depression as a result of stock splits. It is surprising that U.S. firms actively maintained constant nominal prices for their shares...

Economists ubiquitously employ a simple and elegant explanation for risk aversion: It derives from the concavity of the utility-of-wealth function within the expected-utility framework. We show that this explanation is not plausible in most applications, since anything more than economically...

The recent research on ultimatum and dictator games is reviewed. New experiments reveal that the ultimatum game is quite robust to changes in stakes and the nationality of the players but dictator games are sensitive to many design features. Information in the ultimatum game is important....

In responding to a request for predictions about the future of economics, I predict that Homo Economicus will evolve into Homo Sapiens, or, more simply put, economics will become more related to human behavior. My specific predictions are that Homo Economicus will start to lose IQ, will become a...

A wine-loving economist we know purchased some nice Bordeaux wines years ago at low prices. The wines have greatly appreciated in value, so that a bottle that cost only $10 when purchased would now fetch $200 at auction. This economist now drinks some of this wine occasionally, but would neither...

The equity premium is the difference in returns between equities and fixed income securities, such as Treasury bills. The puzzle refers to the fact that the premium has historically been very large--about 6 percent per year--too large to be easily explained by risk aversion. The authors document...

What happens to a state's spending when it receives an unconditional grant from the federal government? The standard theoretical analysis predicts that the increase in spending will be the same as that generated by an equivalent increase in local incomes--or roughly 5-10 percent for most states....

Although there is some evidence that Matthew Rabin existed before 1990, we had the pleasure of discovering him for ourselves when, in the early 1990s, he sent each of us a copy of his manuscript "Incorporating Fairness into Game Theory and Economics" [2]. Matthew was, at this time, an assistant...