On an extension of the von Mises distribution due to Batschelet

This paper considers the three-parameter family of symmetric unimodal circular distributions proposed by Batschelet in [1 Batschelet, E. 1981. Circular Statistics in Biology, London: Academic Press.  [Google Scholar]], an extension of the von Mises distribution containing distributional forms ranging from the highly leptokurtic to the very platykurtic. The family's fundamental properties are given, and likelihood-based techniques described which can be used to perform estimation and hypothesis testing. Analyses are presented of two data sets which illustrate how the family and three of its most direct competitors can be applied in the search for parsimonious models for circular data.     

Variations in horizontal and vertical individualism-collectivism in four regions of Mexico / Variaciones en el individualismo-colectivismo horizontal y vertical en cuatro regiones de México

Cultures can be analysed through cultural syndromes (shared patterns of beliefs, attitudes, norms, roles and values organized around a theme). One of these syndromes, individualism-collectivism, distinguishes collectivist cultures, which prioritize collective over individual interests, from individualist cultures, which value individual autonomy, achievement and freedom. These dimensions intersect with the horizontal-vertical syndrome, where verticality means the preference for a society organized by hierarchies, in contrast to a horizontal culture, which privileges equality. This paper explores these dimensions using a new instrument in a sample of 990 participants from four regions in Mexico. The results of exploratory and confirmatory factorial analyses show four theoretically congruent factors with adequate levels of internal consistency reaching metric equivalence criteria in three of the four samples. The scores show greater support for horizontal individualism and less support for vertical collectivism. These results are discussed within the context of a cultural shift towards individualism.     

The geometry of legal principles

We discuss several possible legal principles from the standpoint of Bayesian decision theory. In particular, we show that a compelling legal principle implies compatibility with decisions based on maximizing the expected utility.     

‘Got to gamble,but I’ve got no money.’ A qualitative analysis of gambling careers in South Italy

With its geographical differences, Italy provides an interesting case study for analysing the cultural and contextual origin of gambling-related problems. By investigating gambling careers, the study sought to scrutinize the interplay between the personal and environmental factors – including social and cultural aspects – that influence changes in gambling habits among gamblers in Naples (South Italy). The convenience sample consisted of 42 problem and recreational gamblers, male and female, aged between 23 and 71 years, with different employment status and educational level. Results clarify how Neapolitans’ gambling habits have moved towards individualization over time, how availability contributes to increasing gambling in various ways, and how employment status and concerns about money can increase the risk of gambling-related problems, thereby increasing socio-economic inequalities. Confirming previous studies, the study casts doubt on the idea that problem gambling is a chronic and progressive disease, and suggests that periods of excessive gambling can be followed by periods of regulated activity, even without turning to formal treatment. However, life events – either positive or negative – can hinder attempts to regulate gambling.