Consider rolling a die with k sides, labeled a1, a2, ..., and ak, respectively. Let P(aj) be the ‘probability’ that a particular side aj appears after rolling the die. Before attempting to calculate P(aj), it is necessary to clarify the meaning of the word ‘probability’. In other words, we must specify what the number P(aj) quantifies. In statistics, the concept of ‘probability’ is formally int...

Hiring and Firing Costs, Adverse Selection and Long-Term Unemployment * In this paper, we present a matching model with adverse selection that explains why flows into and out of unemployment are much lower in Europe compared to North America, while employment-to-employment flows are similar in the two continents. In the model, firms use discretion in terms of whom to fire and, thus, low quality...

This paper studies the impact of competition on the degree of inefficiency in lemons markets. More precisely, we characterize the second-best mechanism (i.e., the optimal mechanism with private information) in a stylized lemons market with finite numbers of buyers and sellers. We then study the relationship between the degree of efficiency of the second-best mechanism and market competitiveness...

LIPN, UMR CNRS 7030. Institut Galilée Université Paris-Nord, 99, avenue Jean-Baptiste Clément 93430 Villetaneuse, France. 2 Université Pierre et Marie Curie, Laboratoire de Physique Théorique de la Matière Condensée, CNRS UMR 7600 Tour 16, 2 étage, 4, place Jussieu, F 75252 Paris Cedex 05, France. 3 H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences Division of Theoreti...

the effects of chemical and physical treatments on the storage life of bitter lemons in jiroft, kerman province, were investigated. after harvesting, the lemons were treated by curing, fungicide, waxed paper, shrink wrap or using a combination of these treatments. the samples were stored in standard citrus fruit boxes for three months at 85-90% relative humidity at a temperature of 3°c. once a ...

the objective followed in this descriptive-survey research was to investigate factors influencing farmers’ attitudes toward participation in water users’ associations. the statistical population of the study consisted of 1435 farmers of markazi district of zanjan county out of whom 329 were selected as sample using cochran formula. random sampling technique was used for the study. a questionnai...

This study highlights the necessity of distinguishing the use of the formal-informal joint channel from the sole reliance on either the formal or informal job search channel. I first used interview data collected in three Chinese cities as well as ethnographic case studies in the existing literature to illustrate a typology of the distribution of job search behavior, by focusing on the match be...