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71.
This article explores the relation between nonexponential waiting times between events and the distribution of the number of events in a fixed time interval. It is shown that within this framework the frequently observed phenomenon of overdispersion—that is, a variance that exceeds the mean—is caused by a decreasing hazard function of the waiting times, whereas an increasing hazard function leads to underdispersion. Using the assumption of iid gamma-distributed waiting times, a new count-data model is derived. Its use is illustrated in two applications, the number of births and the number of doctor consultations. 相似文献
72.
In this study, a variance‐based global sensitivity analysis method was first applied to a contamination assessment model of Listeria monocytogenes in cold smoked vacuum packed salmon at consumption. The impact of the choice of the modeling approach (populational or cellular) of the primary and secondary models as well as the effect of their associated input factors on the final contamination level was investigated. Results provided a subset of important factors, including the food water activity, its storage temperature, and duration in the domestic refrigerator. A refined sensitivity analysis was then performed to rank the important factors, tested over narrower ranges of variation corresponding to their current distributions, using three techniques: ANOVA, Spearman correlation coefficient, and partial least squares regression. Finally, the refined sensitivity analysis was used to rank the important factors. 相似文献
73.
74.
Philippe Aghion Yann Algan Pierre Cahuc 《Journal of the European Economic Association》2011,9(1):3-42
In a cross‐section of countries, state regulation of labor markets is negatively correlated with the quality of labor relations. In this paper, we argue that these facts reflect different ways of regulating labor markets, either through the state or through the civil society, depending on the degree of cooperation in the economy. We rationalize these facts with a model of learning of the quality of labor relations. Distrustful labor relations lead to low unionization and high demand for direct state regulation of wages. In turn, state regulation crowds out the possibility for workers to experiment negotiation and learn about the potential cooperative nature of labor relations. This crowding out effect can give rise to multiple equilibria: a “good” equilibrium characterized by cooperative labor relations and high union density, leading to low state regulation; and a “bad” equilibrium, characterized by distrustful labor relations, low union density, and strong state regulation of the minimum wage. 相似文献
75.
Pierre R. Dasen 《International Journal of Group Tensions》2000,29(1-2):17-49
This article is a selective literature review, viewing adolescence in a cross-cultural perspective. Starting with the Mead/Freeman controversy, it centers on the following question: Which are the cultural contexts that best ensure a smooth transition from childhood to adulthood? The review covers some of the ethnographic research, both case studies and work using the hologeistic method (those using the Human Relations Area Files), and some of the research in cross-cultural and developmental psychology, but neither cross-national comparisons nor studies with migrants in multicultural societies. It is found that social adolescence is a universal life stage, but that it takes very different forms in different societies. Its extension into a youthperiod occurred in societies with an age-grade system, and is nowadays linked to urbanization, industrialization, and formal education. Adolescence does not need to be a period of storm and stress, and the generation gap and problem behaviors considered a “normal” part of adolescence are in fact culturally produced. In many situations, these problematic aspects of adolescence are linked to rapid social change or acculturation, most often in the form of westernization. Societies that manage to keep some continuity, cultural identity, and basic values such as family solidarity, often also manage to avoid importing the problems of adolescence despite social change. Of importance are the tolerance and flexibility of adults, close contact between generations, appropriate role-learning and acceptance into the adult community, including in the economic sphere. 相似文献
76.
Helmuth Cremer Jean-Marie Lozachmeur Pierre Pestieau 《Journal of population economics》2012,25(2):763-778
We study the optimal income taxation of couples. We determine the resulting intra-family labor supply allocation and its implication
for the choice of the tax unit (individual versus joint taxation). We provide a general condition for full joint taxation
to arise. We also study how the spouses’ respective labor supply decisions are distorted when the condition does not hold.
In particular, we show that, depending on the pattern of mating, the celebrated result according to which the spouse with
the more elastic labor supply faces the lower marginal tax rates may or may not hold in our setting. 相似文献
77.
Gareth Williams Alex Duncan Pierre Landell‐Mills Sue Unsworth 《Development policy review : the journal of the Overseas Development Institute》2009,27(1):5-31
Theories of growth have made progress in understanding the mechanisms of growth in economic terms. However, there is less understanding of the political processes that enable or obstruct these mechanisms. This article provides a four‐stage framework to clarify and analyse the connections between politics and growth: (i) discussing the basic conditions essential for growth; (ii) suggesting that whether or not these conditions emerge depends on specific forms of public‐private interaction; (iii) linking these relationships to the incentives facing those in political power and investors; and (iv) considering the factors at country level that may help to push incentives in a pro‐growth direction. 相似文献
78.
Cet article explore l'impact de la libéralisation des marchés sur la main‐d'?uvre féminine au Québec. Il cherche à valider une intuition formulée par Brunelle, Beaulieu and Minier ( 2004 ) en guise de conclusion d'un rapport de recherche mettant en relief l'essor et la prolifération des marchés périphériques du travail dans le capitalisme mondialisé. Parce qu'elles sont surreprésentées dans le travail atypique, les auteurs se demandaient alors si la restructuration des marchés du travail avait des impacts négatifs les femmes. En nous appuyant sur quatre études de cas dans différents secteurs de l'économie (habillement, commerce de détail, télécommunications, services d'aide à domicile), l'article valide l' hypothèse d'une rehiérarchisation genrée du marché du travail sur la base de statuts d'emploi dans le sillage du processus de libéralisation. The article explores the impact of market liberalization on Quebec's female workforce in a context of global capitalism by testing a hypothesis formulated by Brunelle, Beaulieu, and Minier ( 2004 ) as a concluding remark of a research that exposed the burgeoning of secondary labor market: “Is liberalization leading to an employment‐statuses‐based restructuration of labor markets that would have negative impacts on women?” Using four case studies in key sectors of the economy (garments, retail, telecom, home‐care services), the article suggests a genderized rehierarchization of labor markets based on employment statuses in the wake of the liberalization process. 相似文献
79.
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