Local martingales, arbitrage, and viability Free snacks and cheap thrills

Summary. We revisit a standard model of security prices as Ito processes, and provide some new economic insights about the role of arbitrage and credit limits within such a model. We show that the standard assumptions of a positive state prices and existence of an equivalent martingale measure exclude prices that are viable models of competitive equilibrium and that are potentially useful for modeling actual financial markets. These models have been dismissed in the past as allowing arbitrage, but in fact an agent who prefers more to less and who has limited access to credit may have an optimum. Received: June 9, 1999; revised version: October 4, 1999     

Italian Corporate Governance, Investment, and Finance

Italian industrial structure and financial markets have several distinct features. Italian firms are relatively small, few trade publicly and no corporate bond market exists. The limited types of external funds available to Italian firms makes them prone to financing constraints. We examine a panel containing over 1100 Italian firms. We find that firm size does not appear correlated with the severity of financing constraints. We also find that small firms are frequently mature. Our results suggest that young firms face financing constraints, while mature firms may develop relationships with lenders that lower the costs of external funds. Small, young firms appear to face the tightest financing constraints. Many firms are affiliatedwith pyramidal business groups. We find that affiliation with pyramidal businessgroups appears to reduce the effect of financing constraints. Our results haveimportant implications for government policy to promote small firm growth in Italy.     

An Austrian Theory of the Firm

The modern Theory of the Firm uses the concept of rent and makes implicit assumptions about equilibrium. An Austrian (Market Process) Theory of the Firm should have something to say about each of these. Two strategic perspectives are analyzed, the neoclassical microeconomic perspective (using the Ricardo-Marshall approach to rent) and the Market Process perspective (using the Fetter approach to rent). In a neoclassical world, rents indicate unsolved or unexploited inefficiencies as every hypothetical outcome is viewed against the standard of perfect competition. By contrast, in the Market Process world there is no single ideal standard by which to measure any particular outcome. All action takes place in an open ended universe in which the future is continually being created, in which competition is a discovery process.     

Freedom and the market

Those who believe that the free market is positively related to both economic efficiency and individual freedom are prone to regard resistance to the establishment of the global market essentially free from any serious sociopolitical constraint as a politically insignificant expression of impatience, ignorance, and hypocrisy. This article attempts to endow the manifestation of discontent with the status quo evident in public protests in Seattle and Washington DC with political significance through explicating it as an expression of a fundamental conflict between economic efficiency and individual freedom inherent in the global implementation of the principle of self-regulating markets. This analysis of the antiglobalization movement is conducted from the perspective of the theoretical foundation of the evaluation of the dynamics of capitalism by Polanyi, Hayek, and Keynes, and its conclusions are brought to bear upon the validity of their contesting views of the relationship between economic efficiency and individual freedom.     

Innovation objectives,knowledge sources,and the benefits of breadth

Given the inherent risk of innovative activity, firms can improve the odds of success by pursuing multiple parallel objectives. Because innovation draws on many sources of ideas, firms also may improve their odds of successful innovation by accessing a large number of knowledge sources. In this study, we conduct one of the first firm‐level statistical analyses of the impact on innovation of breadth in both innovation objectives and knowledge sources. The empirical results suggest that broader horizons with respect to innovation objectives and knowledge sources are associated with successful innovation. We do not find diminishing returns to breadth in innovation objectives, which suggests that firms may tend to search too narrowly. We interpret these results in light of well‐known cognitive biases toward searching in relatively familiar domains. Copyright © 2009 John Wiley & Sons, Ltd.     

The Gender Gap in Funeral Directors: Burying Women with Ready‐to‐Embalm Laws?

Over the last few decades, the gender composition of funeral directors in the United States has changed dramatically as women have entered this traditionally male‐dominated occupation. To practise as funeral directors, women (and men) must be licensed in all but one state. The most extensive training requirements exist in the 27 states with ‘ready‐to‐embalm’ laws, which require funeral directors to be embalmers. Using a sample of 45,989 licensing records from 40 states, we find that 18.1 per cent of funeral directors were women in 2006. However, the proportion is significantly lower in states with ready‐to‐embalm laws. Our regressions imply that these laws reduce the proportion of female funeral directors by 24 per cent. More generally, we find that the number of funeral directors per capita is 17 per cent lower, on average, in states with ready‐to‐embalm laws.     

Hierarchical Arrow Social Welfare Functions

Supported by SNF Grant No: DMS 8803556.     

Adoption of improved irrigation and drainage reduction technologies under limiting environmental conditions

Modern irrigation technologies have been suggested as a means of conserving scarce water and reducing environmental pollution caused by irrigated agriculture. This paper applies an economic model of technology selection that provides a general framework to analyzing adoption of irrigation technologies under various environmental conditions. Data from the San Joaquin Valley of California is used to verify the theoretical relationships. Results suggest key variables to be considered by policy makers concerned with adoption of modern irrigation technologies. Among these variables are crop prices, water technology costs, farm organization characteristics, and the environmental conditions of the farm or the field. Policy implications were discussed and analyzed.This research was conducted while the first author was a visiting scholar with the Dept. of Agricultural Economics, University of California, Davis, and USDA-ERS, USA.     

A maximum likelihood approach to estimating dynamic models with unobserved independent variables

A maximum likelihood method to estimate the parameters of dynamic models containing unobserved independent variables is proposed. The approach is to maximize the likelihood of the residuals produced by the recursive Kalman filter equations applied to the model in state-space form. A simulation study is presented comparing the proposed method to the instrumental variable approach. An example using real data is given which estimates models of the Permanent-Income Hypothesis.