Persistence in some energy futures markets

In this study, we examine the possibility of long‐range dependence in some energy futures markets for different maturities. In order to test for persistence, we use a variety of techniques based on non‐parametric, semi‐parametric and parametric methods. The results indicate that there is little or no evidence of long memory in gasoline, propane, oil and heating oil at different maturities. However, when we focus on the volatility process, proxied by the absolute returns, we find strong evidence of long memory in all the variables at different contracts. © 2009 Wiley Periodicals, Inc. Jrl Fut Mark 30:490–507, 2010     

Preference Intensities and Majority Decisions Based on Difference of Support Between Alternatives

Simple majority is one of the most used decision rules in practice. However, under this decision rule, an alternative can defeat another one with very poor support. For this reason, other decision rules have been considered in the literature, such as qualified and special majorities as well as other majorities based on difference of votes. In this paper we generalize the latter mentioned voting systems by considering individual intensities of preference, and we provide some axiomatic characterizations.     

Understanding the Relationship between Financial Development and Monetary Policy

In this paper we summarize the results of a broad exploratory empirical analysis where we relate the level of financial development with the effectiveness of monetary policy. The analysis is based on a panel of countries for which we calculate measures both of financial development and of monetary policy effectiveness. We look for statistically significant relationships between the indicators of financial development, the effectiveness coefficients, and other macroeconomic characteristics by estimating dynamic panels and performing a cluster analysis. We present our results in the form of a list of stylized facts that we consider deserve further attention.     

Contextual Factors and the Creativity of Frontline Employees: The Mediating Effects of Role Stress and Intrinsic Motivation

Creative frontline service employees may be crucial in ensuring organizational performance. However, scant research has investigated the antecedents of service employee creativity. This research applies Role Theory to enlighten this issue. The findings reveal that: role conflict and role ambiguity have opposing effects on creativity; Role Theory complements Cognitive Evaluation Theory as a mediational mechanism for the influence of contextual factors on creativity; and, against current thinking, contextual factors also affect creativity directly. The results underscore the need to reconceptualize the mechanisms by which contextual factors influence creativity, and suggest how managers can promote creativity through the work environment.     

Union Response to Teamwork: the Case of Opel Spain

The article examines the unions’ response to teamwork in Opel Spain in the light of the different theoretical analyses of this change. It is argued, through this case study, that both the unions’ responses and the theoretical approaches to teamwork, are partially derived from particular features of the national systems of industrial relations from where they stem.     

On The Allocative Effects of Rent Seeking

We consider the effects of rent-seeking activities on resource allocation. Before rent-seeking activities take place, there are prior probabilities that an object will be given to one of several agents. The posterior probability depends on prior probabilities and the expenses incurred by all agents. In the case of two agents who equally value the object, prior and posterior probabilities coincide, and thus rent seeking has no effect on resource allocation. If there are two agents with different valuations of the object or we have more than two agents, rent seeking matters and posterior probabilities reflect the valuations of the agents.     

GDP per capita or real wages? Making sense of conflicting views on pre-industrial Europe

This paper studies the apparent inconsistency between the evolution of GDP per capita and real wages in pre-industrial Europe. We show that these two measures will diverge when any of the three following factors are present: changes in income distribution, changes in labour supply per capita and changes in relative prices. We propose a methodology for measuring the effects of these three factors and apply it to the case of 18th century England. For this particular episode the gap between the growth of GDP per capita and real wages can be successfully explained and the main explanatory factor is changes in labour supply per capita. Some further conclusions are drawn from the experience of England during the 19th century and Europe during the early modern period.     

Ethics in Finance and Public Policy: The Ibercorp Case

Our research has found that companies which have diverged from traditional management in order to adopt strategies which include ethics, cooperation and a joint vision of management obtain a greater added value. The new challenges of competitiveness require a position of active cooperation between firms and their suppliers, which should be considered as collaborators rather than adversaries. An active cooperation management may well allow the company to improve the quality of its products and its image, speed up delivery to its clients and make its production and trading more agile, thus enhancing the perception the client has of the product. An improved ethical quality in our dealings, generating trust, improving communication and establishing long-term relationships with joint added value, results in higher competitiveness and greater creation of wealth.     

Money demand stability: Evidence from Spain

Using several tests for structural stability in regressions with I(1) variables and for the existence of cointegration in models with regime shifts, the empirical evidence on the existence of a structural break in the Spanish long-run demand for broad money (ALP2) is analysed.The results indicate that shifts affecting the demand for ALP2 in recent years have substantially altered its long-run properties. As to the cause of this structural break, emphasis is placed on the role played by the increasing openness of the Spanish financial system to international markets as obstacles to free capital movements have progressively disappeared.This paper represents the views of the author and should not be interpreted as reflecting those of any institution. I am grateful to J. Ayuso, J. J. Dolado, F. Restoy and two anonymous referees for helpful comments. The data may be obtained from the internet, http://wotan.wiwi.hu-berlin.de/oekonometric/engl/data.html. This paper was written while the author was working at the Banco de España.     

Segmentation, advertising and prices

This paper explores the implications of market segmentation on firm competitiveness. In contrast to earlier work, here market segmentation is minimal in the sense that it is based on consumer attributes that are completely unrelated to tastes. We show that when the market is comprised by two consumer segments and when there is sufficient variation in the per-consumer costs firms need to incur to access the different consumer populations, then firms obtain positive profits in symmetric equilibrium. Otherwise, the equilibrium is characterized by zero profits. As a result, a minimal form of market segmentation combined with advertising cost asymmetries across consumer segments give firms an opportunity to generate positive rents in an otherwise Bertrand-like environment.