Informal Work in Nonmetropolitan Pennsylvania1

Abstract It is well recognized that the informal economy—unregulated economic activities that generate real or in-kind income—features prominently in the day-to-day lives of many in the developing world. Researchers have begun to explore the informal economy in developed countries but this work has focussed primarily on urban areas to the neglect of rural areas. In this paper the nature and correlates of informal work in nonmetropolitan Pennsylvania are described through an analysis of survey data on 505 families. Results indicate that participation in informal activities is widespread, is not more typical of the poor, does not contribute greatly to family income on average but does help many poor families weather difficult economic times, is both economically and noneconomically motivated, and, net of other sociodemographic variables, is positively related to rurality of residence and formal labor supply.     

Estimation of noncentrality parameters

We propose some estimators of noncentrality parameters which improve upon usual unbiased estimators under quadratic loss. The distributions we consider are the noncentral chi-square and the noncentral F. However, we give more general results for the family of elliptically contoured distributions and propose a robust dominating estimator.     

注重语文能力教学法及其在美国汉语教学中的应用

注重语文能力教学法（Ｐｒｄｉｄｅｎｃ－ｔｒｉｅｎｔｅｄＩｎｓｔｒｕｃｔｉｏｎ）是８０年代在欧美国家出现的新型外语教学方法，已为这些国家欧美语系外语教学广泛采用．其特点是以增强学生外语之语言及文字能力为主，使学生全面掌握所修习的外语。本文介绍此法的形成、发展、特点及其在美国汉语教学中的应用。     

论大学生素质教育

本文论述了素质和大学生素质教育的基本内涵和本质,并论述了当前我国大学生素质的现状以及影响和制约当前我国大学生素质教育的因素,提出了加强和改进大学生素质教育的途径和方法。     

一人公司的法律规制

一人公司法律地位在新公司法上的确立,并不是说在此之前不存在这种公司,事实上一人公司尤其是形式上的普通公司实质上的一人公司是广泛存在的。一人公司与传统公司法人制度的冲突,使它在传统公司法框架体系下很难得以规范,而公司法人人格否认法理作为一种判例法上的重要原则,可以有效弥补成文法上的不足,从而在有效规制一人公司方面具有极为广泛的运用价值。一人公司需要信用的土壤,发挥政府和监管部门的信息披露职能是十分重要的。     

Effects of Medicaid managed care policies on mental health service use among a national probability sample of children in the child welfare system

Children in the child welfare system are dependent upon Medicaid to finance services for their considerable mental health needs. This study examines the effects of Medicaid policies on mental health service use among a national probability sample of children in the child welfare system. Data for this study came from the National Survey of Child and Adolescent Well-Being, the Caring for Children in Child Welfare study, and the Area Resource File. Weighted multivariate logistic regression analyses were conducted to estimate effects of policy variables on children's use of mental health services, controlling for child-level covariates and county-level health resources. Children in counties with behavioral carve-outs under Medicaid managed care had lower odds of inpatient mental health service use. Medicaid managed care enrollment and variations in type of provider reimbursement did not affect use of mental health services. Older age, greater need for mental health services, and higher levels of caregiver education were associated with increased odds of service use. Restrictions on use of inpatient mental healthcare caused by behavioral carve-outs may disproportionately affect children in the child welfare system who have high rates of such use. Careful adoption of carve-outs is necessary to assure appropriate care for these children.     

简谈领导干部形象

良好的领导形象,不仅有利于领导威信的建立,而且有利于领导者的决策、指示、领导方法为群众所接受,并将愉快地执行与创造性地完成。否则,则会影响领导效能。因此,作为一名领导干部应从多方面加强自身修养,塑造良好的领导形象。     

产业集群核心竞争力分析

在经济全球化的今天,产业集群逐渐成为地区、国家之间经济竞争的主要模式。本文探讨了产业集群核心竞争力的框架及其根本所在,最终将它归结为集群内所独有的合作的、信任的、宽容的、激励的、创新的网络经济关系,并由此提出了提升我国产业集群核心竞争力的几点对策建议。