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181.
The prevalence of large and extended families among sharecroppers in northern and central Italy during the eighteenth and nineteenth centuries has been well documented in the historical demographic literature. Landlords relied on tenants' extended household structure to provide a large labor force that increased their income. In earlier centuries, however, landlords' involvement in agricultural production may have had little impact on household structure. Evidence from fifteenth-century Tuscany illustrates that household extension was not as common among sharecroppers during this period of time. Qualitative analyses of personal correspondence and tax declarations from the fifteenth century suggest reasons why landlords' management techniques did not lead to household extension among sharecroppers. Unlike landlords in later periods of time, fifteenth-century landlords relied more on rearranging plots of land than particular demographic practices, because land consolidation was still in progress and farms were not fixed geographically. In addition, during the earlier period of time, sharecropping was less institutionalized and landlords had less power over their tenants. These findings suggest that sharecropping, as a tenurial form, did not necessarily lead to household extension. Instead, the effect of the tenurial form depended on the nature of sharecropping and the degree of landlords' power.  相似文献   
182.
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   
183.
In a number of interesting environments, dynamic screening involves positive selection: in contrast with Coasian dynamics, only the most motivated remain over time. The paper provides conditions under which the principal's commitment optimum is time consistent and uses this result to derive testable predictions under permanent or transient shocks. It also identifies environments in which time consistency does not hold despite positive selection, and yet simple equilibrium characterizations can be obtained.  相似文献   
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Based on 45 interviews in the Paris metropolitan area, I focus on the middle-class segment of France’s North African second-generation and use the framework of cultural citizenship to explain why these individuals continue to experience symbolic exclusion despite their attainment of a middle-class status. Even though they are successful in terms of professional and educational accomplishments and are assimilated by traditional measures, they nonetheless feel excluded from mainstream French society. Because of this exclusion, they do not feel they are perceived as full citizens. I also discuss how this segment of France’s second-generation draws boundaries around being French and how they relate to these boundaries. Despite their citizenship and their ties to France, they are often perceived as foreigners and have their ‘Frenchness’ contested by their compatriots. I argue they are denied cultural citizenship, because of their North African ethnic origin, which would allow them to be accepted by others as part of France. Applying cultural citizenship as an analytical framework provides an understanding of the socio-cultural realities of being a minority and reveals how citizenship operates in everyday life.  相似文献   
186.
We study a continuous‐time principal–agent model in which a risk‐neutral agent with limited liability must exert unobservable effort to reduce the likelihood of large but relatively infrequent losses. Firm size can be decreased at no cost or increased subject to adjustment costs. In the optimal contract, investment takes place only if a long enough period of time elapses with no losses occurring. Then, if good performance continues, the agent is paid. As soon as a loss occurs, payments to the agent are suspended, and so is investment if further losses occur. Accumulated bad performance leads to downsizing. We derive explicit formulae for the dynamics of firm size and its asymptotic growth rate, and we provide conditions under which firm size eventually goes to zero or grows without bounds.  相似文献   
187.
One of the more serious problems faced by child welfare services involves the management of children with serious behavioral and mental health problems. Aggressive and defiant foster children are more likely to have multiple foster care placements, require extraordinary social services resources, and have poor short- and long-term mental health outcomes. Interventions that work with challenging foster children and enhance foster parents' skills in managing problem behaviors are necessary. This article presents the successful results of a single case study examining the application of Parent-Child Interaction Therapy (PCIT) with an aggressive young boy and his foster-adoptive parent. PCIT is a dyadic intervention that has been identified as an empirically supported treatment for abused children and for children with different types of behavioral disruption. The application of PCIT to assist foster parents is a promising direction for child welfare services.  相似文献   
188.
The authors overview the key components of the ADA in this article. A discussion is offered on why and how persons with disabilities are discriminated against. Critical United States Supreme Court decisions are presented; these decisions have greatly limited the power of the ADA in protecting the rights of persons with disabilities. Even though the United States Supreme Court has narrowed the impact of the ADA in American life, a number of Equal Employment Opportunity Commission (EEOC) cases are presented suggesting this federal agency is attempting to protect persons with disabilities against discrimination. Finally, the authors deal with the topic of advocacy; advocacy may well be one of the most effective tools to help insure that the rights of people with disabilities are protected.  相似文献   
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In this study, we investigated trajectories of Black‐White biracial children's social development during middle childhood, their associations with parents’ racial identification of children, and the moderating effects of child gender and family socioeconomic status (SES). The study utilized data from parent and teacher reports on 293 US Black‐White biracial children enrolled in the Early Childhood Longitudinal Study‐Kindergarten Cohort (ECLS‐K). Growth curve models suggested increasing trajectories of teacher‐reported internalizing and externalizing behaviors between kindergarten and fifth grade. Parents’ racial identification of children predicted child externalizing behavior trajectories such that teachers rated biracially identified children's externalizing behaviors lower relative to those of Black‐ and White‐identified children. Additionally, for White‐identified biracial children, the effect of family SES on internalizing behavior trajectories was especially pronounced. These findings suggest that in the USA, how parents racially identify their Black‐White biracial children early on has important implications for children's problem behaviors throughout the elementary school years.  相似文献   
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