Alternative models for hedging yield curve risk: An empirical comparison

We test alternative models of yield curve risk by hedging US Treasury bond portfolios through note/bond futures. We show that traditional implementations of models based on principal component analysis, duration vectors and key rate duration lead to high exposure to model errors and to sizable transaction costs, thus lowering the hedging quality. Also, this quality randomly varies from one model and hedging problem to the other. We show that accounting for the variance of modeling errors substantially reduces both hedging errors and transaction costs for all considered models. Additionally, it leads to much more stable weights in the hedging portfolios and – as a result – to more homogeneous hedging quality. On this basis, error-adjusted principal component analysis is found to systematically and significantly outperform alternative models.     

WHAT'S AN ECONOMICS SEMINAR WORTH? INFORMATION AUTHORS AND ORGANIZERS SHOULD KNOW

Abstract This paper is an empirical study of the publication records of communications to a weekly seminar, continued from 1997. We look at the quality of publications, and also at the determinants of publications. Our results offer lessons for both presenters and organizers of research seminars in academia.     

Growth,productivity and diversification in Africa

The purpose of this article is to investigate the relationship among economic growth, productivity and diversification. Our results have shown that deepening diversification leads to improvements in total factor productivity among other determinants in African economies. The significance of the link between diversification and economic growth in the case of African economies cannot be gainsaid. It means that African countries can scale up their economies’ growth by raising their total factor productivity through pursuing policies that enhance diversification.     

Borrower attributes and the risk of default of conventional mortgages

Using a nationwide sample of 9,000 conventional mortgages, this paper examines their default based on a set of key borrower and loan characteristics. The results of a maximum likelihood failure time model show that the default risk is higher for small mortgages with a high loan-to-value ratio and for borrowers with low income and many dependents. The results also suggest that default is negatively correlated with the age of the property and the borrower's disposable income net of monthly financial obligations.     

The Network Industry,Monopoly Regulation,and Social Optimum

This paper examines pricing policy, quality levels, consumer surplus and social welfare for the monopoly and non‐monopoly case. It is shown that given certain realistic assumptions, the network industry under unregulated monopoly would yield more social welfare than in the case of several producers in the industry, and would therefore be socially preferred.     

PUBLIC CAPITAL, PRODUCTIVE EFFICIENCY AND CONVERGENCE IN THE SPANISH REGIONS (1964–93)

This paper analyses the behaviour of productive efficiency in the Spanish regions for the period 1964–93. From a growth accounting approach, it describes the regional evolution of total factor productivity (TFP'), based on a private inputs production function. A stricter measure of efficiency is then quantified, which is not equivalent to Solow's residual, since public capital is included in the production function and constant returns to scale are not imposed. Finally, on the basis of the measures of total factor productivity and efficiency, the study discusses the existence of technological convergence among Spanish regions and the role played in it by public capital. The renewed interest in the analysis of the process of growth reflected in economic literature in recent years has also occurred in the case of the Spanish economy, with some peculiarities which are worth mentioning. In the 1980s, two important institutional changes took place: a profound political and administrative decentralization, the regions now being autonomous in many decisions on public expenditure, and the incorporation of Spain into the European Community, which as it is well known has a powerful regional policy. Both changes have meant that the analysis of regional economies, and especially their growth paths, have received much more attention from politicians and economists, and even from the population in general. In particular, intense discussion has taken place regarding the effects of development policies and on criteria for geographical distribution of infrastructures. In both cases, much attention has been paid to discussing their capacity to contribute to convergence among the different regions. As a consequence of this greater interest in the analysis of growth from a regional perspective, efforts have also been made to improve the relevant statistical information. In particular, statistical series have been drawn up for investment and accumulated capital stock in each region, both private and public.' This information, only recently available and the first of its kind, as far as we know, in the European regions, substantially broadens the possibilities of research into the Spanish case in this field, where before not even the simplest exercises in growth accounting could be attempted. Further-more, since the series now available allow the time dimension of growth analysis to be combined with the regional dimension, it is possible to work with a panel of data and apply the corresponding techniques. This article analyses the growth of the Spanish economy over the period 1964–93, during which it can be observed that the per capita income levels of the Spanish regions converged. The objective of the study is to evaluate this process of convergence in income from the perspective of the productive efficiency of the regions, in three different ways. First, Section I considers the importance of the contributions of the private factors of production and of improvements in total factor productivity to the growth of output. Secondly, section II studies the existing relationship between the standard measure of efficiency (Solow's residual or TFP') and a stricter measure when the endowments of public capital are considered. Section III analyses whether or not the convergence in per capita income     

Ambidexterity under scrutiny: Exploration and exploitation via internal organization,alliances, and acquisitions

Prior research on ambidexterity has limited its concern to balancing exploration and exploitation via particular modes of operation. Acknowledging the interplay of tendencies to explore versus exploit via the internal organization, alliance, and acquisition modes, we claim that balancing these tendencies within each mode undermines firm performance because of conflicting routines, negative transfer, and limited specialization. Nevertheless, by exploring in one mode and exploiting in another, i.e., balancing across modes, a firm can avoid some of these impediments. Thus, we advance ambidexterity research by asserting that balance across modes enhances performance more than balance within modes. Our analysis of 190 U.S.‐based software firms further reveals that exploring via externally oriented modes such as acquisitions or alliances, while exploiting via internal organization, enhances these firms' performance. Copyright © 2013 John Wiley & Sons, Ltd.