This paper describes the structure of social networks of students within school classes and examines differences in network structure between classes. In order to examine the network structure within school classes, we focused in particular on the principle of homophily, i.e. the tendency that people associate with similar others. When differences between classes were observed, it was investiga...

This paper revisits the link between health insurance and health by estimating a model that allows for insurance and health to be linked through both dynamic and contemporaneous channels, each with di¤erent policy implications. The model produces two main …ndings. First, while insurance and health appear to be negatively related dynamically, they are positively related contemporaneously, with p...

In this paper, we propose a model based on multivariate decomposition of multiplicative— absolute values and signs—components of several returns. In the m-variate case, the marginals for the m absolute values and the binary marginals for the m directions are linked through a 2m-dimensional copula. The approach is detailed in the case of a bivariate decomposition. We outline the construction of ...

The debate in equilibrium selection appears to have culminated in the formation of two schools of thought: those who favor equilibrium selection based on rational coordination and those who favor zero-rationality adaptation. We examine four deductive selection principles and find that each fails to explain experimental data. We propose an inductive selection principle based on simple learning d...

while ignoring income distribution and estimating aggregate demand generally leads to aggregation bias and thus, does not reflect households’ demand properly, yet aggregation bias is rarely considered in empirical demand studies and simply is ignored in most cases. the objective of the present study is to estimate aggregation bias in households’ demand for various types of meats and to evaluate...

Abstract The Italian market of sparkling wines increases as volume and assortment (such brands, appellations, typologies) mainly because Prosecco consumption. We investigate the repeated purchase behavior in two years within supermarket channel through scanner data collected from a consumer panel. propose Hidden Markov Model to analyze these data, assuming an unobservable process capture consum...

This study sought to develop a biological control agent against gray mold disease caused by Botrytis cinerea in tomato using a strain of Streptomyces, which showed significant antagonistic activity against B. cinerea. Such strain (C51) was screened by dual culture method from a total of 78 actinomycetes and was identified as Streptomyces nobilis by morphological, biochemical and molecular analy...