Complete and incomplete markets with short-sale constraints

Summary. This paper argues that the introduction of a short-sale constraint in the Arrow-Radner framework invalidates standard definitions of complete and incomplete markets. Two threshold values with familiar properties arise in this constrained set-up. If short sales are not allowed on some security, then financial markets will be incomplete in the standard sense. Beyond a particular level of the short-sale bound, financial markets are “complete”, since the short-sale constraint is not effective. For intermediate bounds the distinction between complete and incomplete financial markets is blurred. Although some technical definitions hold, agents can not fully transfer wealth among states. These intermediate cases, called “technically incomplete markets”, exhibit interesting welfare properties. For instance, the resulting equilibrium allocations may not be Pareto-dominated by those of the non-restricted complete markets equilibrium. Received: November 28, 2000; / revised version: November 9, 2001     

A re-examination of international portfolio diversification based on evidence from leveraged bootstrap methods

This article investigates the issue of international portfolio diversification with respect to the three largest financial markets in the world—namely the US, Japan and the UK. In addition to making use of traditional portfolio analysis, we also suggest a procedure to calculate bootstrap correlation coefficients that can take into account the dynamic structure between the markets as measured by bootstrapped causality tests. Weekly data is used. The results from the first approach are supporting international diversification. The bootstrapped causality tests provide additional empirical support for this conclusion since the size of the causal effects is negligible and the bootstrap correlations are similar as the standard ones.     

How Much Do Strategic Groups Matter?

Understanding firm heterogeneity is the first step towards explaining the dispersion of profit rates between firms. This paper proposes a framework that distinguishes between three sources of competitiveness, related to three levels of firm heterogeneity, which give rise to industry competencies, strategy-specific competencies and firm-specific competencies. Using data from a Spanish survey we estimate the relative importance of these three sources of heterogeneity. We show that taking the group effect into account significantly differentiates our results from those obtained in previous research. We provide new evidence on the existence of a significant group effect and also an estimate of its relative importance vis á vis firm and industry effects.     

Personal values and leadership effectiveness

The study sought to evaluate the personal values profile, the predominant leadership styles, the leadership effectiveness, and the relationship between personal values balance and leadership effectiveness of a group of Brazilian executives. In order to evaluate the personal values profile a closed instrument of the rank order type has been developed and applied. To identify the predominant leadership styles, as well as the leadership effectiveness of the involved executives, it has been used as an instrument available in the market. To verify the relationship between personal values balance and leadership effectiveness, the linear regression method has been used computing the linear correlation coefficient between the before mentioned variables, involving 400 executives. The study has shown that the executives have an unbalance in their personal values profile, with predominance of economic and theoretical values. Additionally the study has uncovered lack of flexibility regarding the leadership styles, presenting styles of selling and sharing ideas as dominants. The study also showed that the leadership effectiveness of the involved executives was at a moderate level. Finally, the research pointed out a high positive relationship between personal values balance and leadership effectiveness, and, furthermore, it showed a better balance of personal values, if one considered only the part of the sample involving executives working in organizations which presented better results in the three previous years (50 executives).     

On the effect of prior assumptions in Bayesian model averaging with applications to growth regression

We consider the problem of variable selection in linear regression models. Bayesian model averaging has become an important tool in empirical settings with large numbers of potential regressors and relatively limited numbers of observations. We examine the effect of a variety of prior assumptions on the inference concerning model size, posterior inclusion probabilities of regressors and on predictive performance. We illustrate these issues in the context of cross‐country growth regressions using three datasets with 41–67 potential drivers of growth and 72–93 observations. Finally, we recommend priors for use in this and related contexts. Copyright © 2009 John Wiley & Sons, Ltd.     

Comments on ‘Jointness of growth determinants’

We consider the measures of jointness proposed by Doppelhofer and Weeks ( 2009 ) and Strachan ( 2009 ) in the context of variable selection. Using the general criteria suggested in Ley and Steel ( 2007 ), we identify some shortcomings of these measures, which are illustrated with empirically relevant example cases. We argue that careful examination of the properties of any jointness measure is critical before using it to inform decisions, and favour the use of the measures proposed in Ley and Steel ( 2007 ). Copyright © 2009 John Wiley & Sons, Ltd.     

Switching regressions and activity analysis: A new approach to frontier estimation

We explore an approach to production frontier estimation based on the direct study of the primary activities in linear technologies. Technologies with smoother isoquants can be thought of as the limit of a linear technology when the number of activities grows to infinity.     

Concentration and foreign penetration in Latin American banking sectors: Impact on competition and risk

In the 1990s, Latin American banking sectors experienced an accelerated process of concentration and foreign penetration that prompted diverse views regarding its implications for the competitive behavior of banks and the financial stability of the system. In this paper, we examine these issues exploiting a rich bank-level database for eight Latin American countries. We find that, while increased concentration did not weaken banking competition within the region, foreign penetration appears to have led to a less competitive industry. Moreover, we find that bank risk has been negatively associated with competition which, coupled with the previous finding, explains the positive link between banking sector stability and foreign penetration revealed by the data.     

What influences continuous employee development decisions?

Organizational changes have created a need for adaptable pre-trained workers and for employees to have more “protean” career paths and be involved in self-directed ongoing development [Hall & Mirvis, 1995. The new career contract: Developing the whole person at midlife and beyond. Journal of Vocational Behavior, 47(3), 269–289]. To help understand the processes involved in this development, a model of continuous employee development is proposed. This model integrates prior work from career development, training, and education literatures and builds on it by proposing factors that affect the occurrence of future development. Research supporting the model is reviewed and specific testable propositions derived from the variables in the model are given. Recommendations for scale usage in testing the model are also provided. Finally, the novel contributions of the model are highlighted, the practical implications of the model for organizations are outlined, and the role of the education system in these processes is discussed.     

DO MARKETS PENALIZE AGENCY CONFLICTS BETWEEN CONTROLLING AND MINORITY SHAREHOLDERS? EVIDENCE FROM CHILE

Using a sample of Chilean listed firms with widespread presence of economic conglomerates that use pyramid structures to control affiliated companies, we find that firms where controlling shareholders have higher coincidence between cash and control rights are persistently more valued by the market. We carefully check that our results are not driven by omitted variable biases and control for reverse causation using a feature of Chilean Corporations Law that provides an exogenous instrument for ownership concentration.