Prospect theory in the wild: how good is the nonexperimental evidence for prospect theory?

ABSTRACT

Prospect theory is widely thought to be one of the best-confirmed accounts of human decision-making under risk. There are numerous claims in the literature that various kinds of nonexperimental, observational evidence provide strong support for prospect theory. We investigate the veracity of these claims using a set of philosophy of science morals and a careful delineation of models of choice under risk, focussing on the extant versions of prospect theory and their various components. We challenge the claim that prospect theory is well supported because it explains the equity premium puzzle. In addition, we analyse a major international survey thought to support prospect theory and argue that the support is questionable, both for statistical reasons and because the evidence itself is mixed. Our analyses highlight some important ideas in the philosophy of science and caution against strong claims about support for prospect theory that rely on nonexperimental, observational evidence.     

Investor protection and price informativeness about future earnings: international evidence

This study draws on the investor protection literature to identify structural factors in a country’s information environment that are likely to explain cross-country differences in the extent to which future earnings information is capitalized in current stock returns. Using a sample of 55,900 firm-years from 32 countries, we find that greater financial disclosure, higher quality earnings, and greater information dissemination through news media are associated with stock prices that are more informative about future earnings, whereas strong enforcement of insider trading laws is associated with stock prices that are less informative about future earnings. We also find that, on average, price informativeness about future earnings is greater in countries with strong investor protection. Our results illuminate the importance of structural factors constituting a country’s information environment in explaining cross-country variation in price informativeness about future earnings.     

Corporate Risk Management under Information Asymmetry

This paper examines the financial and operational hedging activities of US pharmaceutical and biotech firms that are subject to a high level of information asymmetry stemming from R&D investments during 2001–2006. We find evidence in support of the information asymmetry hypothesis à la Froot, Scharfstein and Stein (1993) that hedging helps mitigate the under‐investment problem. Specifically, we find that the use of financial derivatives is associated with greater firm value and that the value enhancement is larger for firms subject to greater information asymmetry and better growth opportunities. There is a synergy between financial hedging and operational hedging where the latter is used to counter product development risk. The results are robust with respect to alternative performance measures, industry‐specific growth measures, and the endogeneity problem. Our work is differentiated from existing studies that examined commodity‐based industries without addressing information asymmetry.     

Pensions and poverty traps: Is saving worthwhile for women?

Present policy means that a private pension, unless it is substantial, may fail to bring financial gain in retirement due to means testing: the pensions poverty trap. This paper examines women's acquisition of private (occupational and personal) pensions and their risk of facing this trap. Because of the loosening link between marriage and motherhood, previous patterns of pension advantage according to marital status are shifting. The employment and pension impact of motherhood varies with socio-economic status but the pension prospects of the majority of women are poor. It is concluded that women's need for financial advice to avoid the pensions poverty trap is greater than men's. An improved basic pension, indexed to national income, would reduce the risk of mis-selling and restore confidence that saving for a pension is worthwhile.     

Rationalizing the International Coffee Agreement virtually

From 1963 to 1989, the International Coffee Agreement controlled world trade in coffee. Like an export cartel, the organization included coffee exporters and importers as members. This paper seeks to understand the behavior of the ICA by treating it as an optimizing entity, which from social choice theory we know to be inherently troublesome. A social choice rule is specified for the ICA that is virtually implementable in Nash equilibrium. The empirical results provide arationalizing argument for the ICA, in the sense that if it sought to maximize the specified criterion function, we would expect it to behave precisely as it did behave.     

Money Growth,Output Growth,and Inflation: A Reexamination of the Modern Quantity Theory's Linchpin Prediction

A testable implication of the modern quantity theory of money, when viewed as a theory of inflation, is the joint hypothesis that (i) there is a one-to-one positive relationship between inflation and the money stock growth rate, (ii) there is a one-to-one negative relationship between inflation and the aggregate output growth rate, and (iii) there are no other determinants of inflation besides the money stock and aggregate output expansion rates. This implication is the theory's linchpin prediction. A recent prior study published in this journal examines cross-country data and reports that this hypothesis cannot be rejected. The present study reexamines the prior study's data and finds that the joint hypothesis is decisively rejected, an unpleasant finding from a monetarist perspective. The article then goes on to propose an alternative to the prior study's model of the inflation process and reports findings that are, from the perspective of a monetarist, at least mildly pleasant.     

Social entrepreneurship: towards conceptualisation

The marketing in strategy dialogue and the emerging marketing/entrepreneurship interface paradigm stress the need for marketers to research entrepreneurship. Social entrepreneur‐ship, the entrepreneurship leading to the establishment of new social enterprises and the continued innovation in existing ones, is much discussed but little understood and given the increasing importance of such organisations should be addressed. This paper conceptualises social entrepreneurship as a multidimensional construct involving the expression of entrepreneurially virtuous behaviour to achieve the social mission, a coherent unity of purpose and action in the face of moral complexity, the ability to recognise social value‐creating opportunities and key decision‐making characteristics of innovativeness, proactiveness and risk‐taking. The paper discusses implications for policy and practice and concludes with a consideration of theoretical issues and directions for future research. Copyright © 2003 Henry Stewart Publications