Registration of longitudinal data by means of musical notation: some applications

Graphic representation of complicated courses is often necessary to detect patterns that may be worth analysing. Examples are given to show how musical notation or modifications of musical notation may be used to register courses (or cross-sectional data) with more variables than usual. One can register courses with known duration of components (and then also simultaneities); the time scale may be defined according to data. One can also register sequences without known duration of components. Finally the method can be modified so as to suit cross-sectional data. The method can be used to register a single case but also a group of cases that are thus rendered comparable. It is a method of registration, not of analysis but one that may help prepare a refined analysis.     

A short history of algebraic statistics

In algebraic statistics, computational techniques from algebraic geometry become tools to address statistical problems. This, in turn, may prompt research in algebraic geometry. The basic ideas at the core of algebraic statistics will be presented. In particular, we shall consider application to contingency tables and to design of experiments.     

Evaluation of drought management in irrigated areas

This paper focuses on the economic consequences of droughts for the irrigation sector. We develop a dynamic‐recursive mathematical programming farm model that assumes imperfect mobility of capital and labour as well as rational expectations about future water availability. The model is calibrated to 12 representative farms belonging to three irrigation communities of the Guadalquivir Basin (south Spain) and used to simulate the 1991–1997 period, which included 3 years of intense drought. Results indicate that the drought imposed significant costs on farmers, but show also that water managers partly exacerbated these costs by allocating excessive amounts of water to irrigators in the abundant years. The model is also used to evaluate the benefits of a perfect water supply forecast and to simulate the economic gains of a voluntary water banking scheme. Results show that the benefits resulting from the perfect forecast of water supply 1 year ahead would represent a relative gain of 5%. However, a voluntary banking system would allow farmers to increase their benefits by 32–82% depending on the supply system.     

Conditional beta pricing models: A nonparametric approach

We propose a two-stage procedure to estimate conditional beta pricing models that allows for flexibility in the dynamics of asset betas and market prices of risk (MPR). First, conditional betas are estimated nonparametrically for each asset and period using the time-series of previous data. Then, time-varying MPR are estimated from the cross-section of returns and betas. We prove the consistency and asymptotic normality of the estimators. We also perform Monte Carlo simulations for the conditional version of the three-factor model of Fama and French (1993) and show that nonparametrically estimated betas outperform rolling betas under different specifications of beta dynamics. Using return data on the 25 size and book-to-market sorted portfolios, we find that the nonparametric procedure produces a better fit of the three-factor model to the data, less biased estimates of MPR and lower pricing errors than the Fama–MacBeth procedure with betas estimated under several alternative parametric specifications.     

Tactical Redistribution Between Regions When Parties and Voters Care About Ideology

In this paper, redistributive transfers between regions are examined in a political economy model where both parties and voters are led by selfish as well as ideological motives, the latter taking the form of egalitarian objectives. Parties announce election platforms about how to distribute funds between regions and different income types, and voters react to these platforms when casting their vote. It is found that regional transfers are completely tactical; it is the political power of a region that decides if it will be a receiver or a contributor. Ideological goals are reached by redistributive transfers between different income types.     

What’s trade got to do with it? Relative demand for skills within Swedish manufacturing

What’s Trade Got to Do with It? Relative Demand for Skills within Swedish Manufacturing. — This paper seeks to identify the contribution of trade and technological change to the increase in inequality between skilled and unskilled workers in Sweden since the 1970s. An empirical approach is adopted which allows for the outsourcing of the low-skill parts of the production chain to low-wage locations and is applied to detailed industry and bilateral trade data, the latter distinguishing between low-wage sources of imports and OECD countries. The paper finds that, in contrast to previous studies, trade with low-wage countries may have contributed to the rise in inequality in Swedish manufacturing. The empirical results also suggest that the increased use of technology also played a role in creating greater inequality between skilled and unskilled workers in Sweden, with the magnitude of this impact increasing in the 1990s.     

The Value Relevance of Accounting Income Reported by DAX-30 German Companies

International Financial Reporting Standards (IFRS) are required for consolidated financial statements of all European Union (EU) publicly traded companies starting from the December 2005 fiscal year end [Regulation (EC)]; and endorsed by the International Organization of Securities Commission (IOSCO) for its member countries beginning in 2000. We examine the challenges and benefits, including value relevance, of the adoption of IFRS by DAX‐30 companies, the German premium stock market. Based on a survey sent to DAX‐30 company executives, we find most companies agreeing that implementing IFRS should improve the comparability of financial statements. The complex nature, high cost of adopting and lack of guidance for implementing IFRS, as well as increased volatility of earnings after adopting IFRS, are listed among the most important challenges of conversion to IFRS. We use regression to measure another benefit: the value relevance of book values of earnings and equity in explaining market values of DAX‐30 companies during the period 1995–2004. Using 265 observations, we find that adopting IFRS or US Generally Accepted Accounting Principles or cross‐listing on the New York Stock Exchange significantly increases the value relevance of earnings relative to market prices.     

Spontaneous duodenal fistula due to hepatic hydatid cyst

Connunication of a hepatic hydatid cyst to the duodenum appears to be extremely rare. This is the first case described in the imaging literature of hepatic echinococcosis fistulized to the duodenum studied by computed tomography.