Aplicación de bicorrelación cruzada al rendimiento diario del precio del café

This paper uses the cross bicorrelation methodology, which can capture nonlinear trascendence periods through window functions and third-order moments. It applies to the return of four sets of commodities of coffee traded on the New York market (Arabica Colombian, mild Arabica, Arabica Brazilian and Other Arabicas), during the 20/06/1997 - 27/10/2010 period. The results conclude that there is a cross bicorrelation among the four series, with Brazilian type coffee being the leader and a lower bicorrelation with other Arabicas. This complicates decisions for investors in such series.     

The application of proxy methods for estimating the cost of equity for unlisted companies: evidence from listed firms

Review of Quantitative Finance and Accounting - The Campbell and Vuolteenaho (Am Econ Rev 94(5):1249–1275, 2004) two–beta model decomposes the systematic risk in the sensitivity of cash...     

Introductory nutrition students' attitudes towards obesity: ethnic and gender differences

Abstract The objectives of this study were to discover whether a multicultural sample of college students enrolled in an introductory nutrition class held negative attitudes towards personal obesity and obesity in others, whether these attitudes differed between men and women and whether personal obesity and attitudes towards obesity were related to ethnicity. Introductory nutrition students (n=390) from five ethnic groups completed an anonymous questionnaire containing various measures of opinions relevant to obesity. Attitudes towards obesity in others and oneself were somewhat negative. Women had higher restraint scales than men, were more dissatisfied with their weight and preferred a thinner figure than the one they considered healthiest. Similar gender differences were found for all ethnic groups. The results imply that education about the stereotyping of obesity should be included in nutrition education courses.     

Creating Psychological and Legal Contracts Through HRM Practices: A Strength of Signals Perspective

We integrate the concept of signaling theory to propose that organizations create psychological and legal contracts through their human resource management practices (HRM). Focusing on the strength of the signal generated by HRM practices, we develop a framework for contract creation. Specifically, we define and outline how weak signals generate psychological contracts and strong signals develop legally binding contracts. We provide several examples of HRM hiring practices, the weak and strong signals which they emit and the psychological and legal contracts which they create. Our key contribution is to provide a precise model for understanding the distinction between a psychological and legal contract.     

Creating psychological and legal contracts through human resource practices: A signaling theory perspective

Despite the surge in research on the psychological contract over the past two decades, there has been little integrative research that has examined psychological contracts in conjunction with legal contracts. We address this shortcoming by presenting a framework for understanding the differences between psychological contracts and legal contracts in the United States. This is done by presenting definitions and examples of psychological contracts (i.e., relational and transactional) and the two forms of legal contracts: (a) express (written and oral), and (b) implied (quasi-contract and promissory estoppel). In addition, by utilizing signaling theory [Rynes, S.L. (1991). Recruitment, job choice, and post-hire consequences: A call for new research directions. In M. D. Dunnette & L. M. Hough (Eds.), Handbook of industrial and organizational psychology, (pp. 399–444). Palo Alto, CA: Consulting Psychologists Press.], we describe the means by which human resource practices such as recruitment, training, performance appraisal, compensation, and employee handbooks can create psychological and legal contracts. We conclude by proposing directions for future research and implications for practicing managers.     

Economic feasibility analysis for electrical generation from biogas in waste disposal sites in Mexico City

This article highlights the main aspects related to energy generation from biogas in a controlled landfill of Mexico City in order to determine profits and environmental benefits. The designed structures and public policies to provide waste management services in Mexico City have been exceeded. A significant increase in demand has led the government of Mexico City to base public services on rudimentary techniques using obsolete equipment. The modernization of waste disposal facilities and the diversification of services linked to waste treatment can offer several business opportunities to optimize energy generation from solid wastes. The use of landfills to dispose large amounts of waste enables the energy generation from biogas. The energy generated can diversify the electricity market and provide economic benefits to landfills managers to cover operational costs.