Junk e-mail or spam is rapidly choking off e-mail as a reliable and efficient means of communication over the Internet. Although the demand for human attention increases rapidly with the volume of information and communication, the supply of attention hardly changes. Markets are a social...

We present data on privacy practices in e-commerce under the European Union's (EU's) formal regulatory regime prevailing in the United Kingdom (U.K.), and compare it to the data from a previous study of United States (U.S.) practices that evolved in the absence of government laws or enforcement....

Under what conditions is government regulation better at protecting market participants than private, evolving, market-driven protections? An intriguing answer to that question emerges if we examine a relatively unregulated area of market participant protection: e-commerce privacy. In the United...

We experimentally explore how investor decision horizons influence the formation of stock prices. We find that in long-horizon sessions, where investors collect dividends till maturity, prices converge to the fundamental levels derived from dividends through backward induction. In short-horizon...

Is personal currency issued by participants sufficient to operate an economy efficiently, with no outside or government money? Sahi and Yao (1989) and Sorin (1996) constructed a strategic market game to prove that this is possible. We conduct an experimental game in which each agent issues her...

Mandatory certification of the financial reports of publicly-held corporations by independent auditors has been a key element in U.S. regulatory framework to improve financial reporting. The economic consequences of mandatory certification remain controversial. Although each market is unique,...

This paper studies the role of transfers among groups within a country as well as among countries in a two level game of international trade negotiations. We show that in order to realize the intended transfer in the presence of asymmetric information on the states of recipients (and donors), a...

Double auctions with profit-motivated human traders as well as "zero-intelligence" programmed traders have previously been shown to converge to Pareto optimal allocations in partial equilibrium settings. We show that these results remain robust in two-good general equilibrium settings and...

Closed exchange and production-and-exchange economies may have multiple equilibria, a fact that is usually ignored in macroeconomic models. Our basic argument is that default and bankruptcy laws are required to prevent strategic default, and these laws can also serve to provide the conditions...

We present a model in which an outside bank and a default penalty support the value of fiat money, and experimental evidence that the theoretical predictions about the behavior of such economies, based on the Fisher-condition, work reasonably well in a laboratory setting. The import of this...