Perfectly competitive innovation

Based partially on the belief that innovation is not possible under perfect competition, a huge number of papers have been written about the nature of innovation under monopoly or oligopoly. In fact, competitive rents can and do sustain innovation in the complete absence of monopoly power. However, little is known about the source and significance of these rents, or about the way in which innovative activity takes place under conditions of competition. We begin to remedy this imbalance by examining the way in which competitive innovators earn rents both in theory and in practice.     

An empirical inquiry into the nature of the forward exchange rate bias

This paper tests whether anticipated real exchange rate movements fully account for the systematic, time-varying discrepancies between forward and future spot exchange rates. The data do not reject this hypothesis. The results demonstrate that (1) real exchange rate changes are predictable; (2) anticipated real exchange rate changes are reflected in the forward bias; and (3) information available at the signing of the forward contract is useless in forecasting differences between forward and future spot prices beyond the information's ability to predict real exchange rate changes. The results emphasize the importance of real exchange rates in international asset pricing.     

Why is the teen birth rate in the United States so high and why does it matter?

Teens in the United States are far more likely to give birth than in any other industrialized country in the world. U.S. teens are two and a half times as likely to give birth as compared to teens in Canada, around four times as likely as teens in Germany or Norway, and almost 10 times as likely as teens in Switzerland. Among more developed countries, Russia has the next highest teen birth rate after the United States, but an American teenage girl is still around 25 percent more likely to give birth than her counterpart in Russia. Moreover, these statistics incorporate the almost 40 percent fall in the teen birth rate that the United States has experienced over the past two decades. Differences across U.S. states are quite dramatic as well. A teenage girl in Mississippi is four times more likely to give birth than a teenage girl in New Hampshire--and 15 times more likely to give birth as a teen compared to a teenage girl in Switzerland. This paper has two overarching goals: understanding why the teen birth rate is so high in the United States and understanding why it matters. Thus, we begin by examining multiple sources of data to put current rates of teen childbearing into the perspective of cross-country comparisons and recent historical context. We examine teen birth rates alongside pregnancy, abortion, and "shotgun" marriage rates as well as the antecedent behaviors of sexual activity and contraceptive use. We seek insights as to why the rate of teen childbearing is so unusually high in the United States as a whole, and in some U.S. states in particular. We argue that explanations that economists have tended to study are unable to account for any sizable share of the variation in teen childbearing rates across place. We describe some recent empirical work demonstrating that variation in income inequality across U.S. states and developed countries can explain a sizable share of the geographic variation in teen childbearing. To the extent that income inequality is associated with a lack of economic opportunity and heightened social marginalization for those at the bottom of the distribution, this empirical finding is potentially consistent with the ideas that other social scientists have been promoting for decades but which have been largely untested with large data sets and standard econometric methods. Our reading of the totality of evidence leads us to conclude that being on a low economic trajectory in life leads many teenage girls to have children while they are young and unmarried and that poor outcomes seen later in life (relative to teens who do not have children) are simply the continuation of the original low economic trajectory. That is, teen childbearing is explained by the low economic trajectory but is not an additional cause of later difficulties in life. Surprisingly, teen birth itself does not appear to have much direct economic consequence. Moreover, no silver bullet such as expanding access to contraception or abstinence education will solve this particular social problem. Our view is that teen childbearing is so high in the United States because of underlying social and economic problems. It reflects a decision among a set of girls to "drop-out" of the economic mainstream; they choose non-marital motherhood at a young age instead of investing in their own economic progress because they feel they have little chance of advancement. This thesis suggests that to address teen childbearing in America will require addressing some difficult social problems: in particular, the perceived and actual lack of economic opportunity among those at the bottom of the economic ladder.     

Anti-Malthus: Conflict and the evolution of societies

The Malthusian theory of evolution disregards a pervasive fact about human societies: they expand through conflict. When this is taken account of the long-run favors not a large population at the level of subsistence, nor yet institutions that maximize welfare or per capita output, but rather institutions that generate large amount of free resources and direct these towards state power. Free resources are the output available to society after deducting the payments necessary for subsistence and for the incentives needed to induce production, and the other claims to production such as transfer payments and resources absorbed by elites. We develop the evolutionary underpinnings of this model, and examine the implications for the evolution of societies in several applications. Since free resources are increasing both in per capita income and population, evolution will favor large rich societies. We will show how technological improvement can increase or decrease per capita output as well as increasing population.     

Stock Market Development and Long-Run Growth

Is the financial system important for economic growth? One lineof research argues that it is not; another line stresses theimportance of the financial system in mobilizing savings, allocatingcapital, exerting corporate control, and easing risk management.Moreover, some theories provide a conceptual basis for the beliefthat larger, more efficient stock markets boost economic growth.This article examines whether there is a strong empirical associationbetween stock market development and long-run economic growth.Cross-country growth regressions suggest that the predeterminedcomponent of stock market development is positively and robustlyassociated with long-run economic growth.     

On characterizing equilibria of economies with externalities and taxes as solutions to optimization problems

Summary We characterize equilibria of general equilibrium models with externalities and taxes as solutions to optimization problems. This characterization is similar to Negishi's characterization of equilibria of economies without externalities or taxes as solutions to social planning problems. It is often useful for computing equilibria or deriving their properties. Frequently, however, finding the optimization problem that a particular equilibrium solves is difficult. This is especially true in economies with multiple equilibria. In a dynamic economy with externalities or taxes there may be a robust continuum of equilibria even if there is a representative consumer. This indeterminacy of equilibria is closely related to that in overlapping generations economies.An earlier version of this paper, entitled Externalities and Taxes in General Equilibrium, was presented at the North American meetings of the Econometric Society, June 1988, at the University of Minnesota. We are grateful to David Backus, Kenneth Judd, Patrick Kehoe, and Rodolfo Manuelli for helpful conversations. National Science Foundation grants SES 86-18325 and SES 87-08616 provided financial support.The views expressed herein are those of the authors and not necessarily those of the Federal Reserve Bank of Minneapolis or the Federal Reserve System.     

A critical examination of the AICPA Code of Professional Conduct

The American Institute of Certified Public Accountants (AICPA) is responsible for the Code of Professional Conduct that governs the actions of CPAs. In 1988, the Code was revised by the AICPA, but a number of issues still remain unresolved or confounded by the new Code. These issues are examined in light of the profession's stated commitment to the public good, a commitment that is discussed at length in the new Code.Specifically, this paper reviews the following issues: (1) client confidentiality and whistleblowing, (2) limited liability, and (3) auditor independence. We argue that, in each of these areas, the AICPA promotes a position that is potentially harmful to the public good.Allison Collins is an Assistant Professor in the Department of Accounting and Taxation at Colorado State University. She has been a Certified Public Accountant since 1982. She has published previously inJournal of Business Ethics.Normal Schutz is an Associate Professor in the Department of Accounting and Taxation at Colorado State University. He has published in such journals asJournal of Business Ethics, EDP Auditor Journal andInternal Auditor.     

Editors' Introduction: The Effects of New Work Practices on Workers

The effects of employee involvement have been widely studied, including a special issue of this journal ( Ichniowski et al. 1996 ). This issue examines the effects of involvement and related programs on employees. This introduction examines several relevant theories and describes the methodological challenges. Of the many outcomes of interest ranging from employee satisfaction to health and safety, we focus our literature review on one: wages. The results of the studies we review vary widely, as do the programs those studies examine. Our reading is that many programs have no effect on wages, while on average, the effect is a small increase in wages after companies introduce new work systems with higher employee involvement.