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11.
Does More Schooling Reduce Hospitalization and Delay Mortality? New Evidence Based on Danish Twins 总被引:2,自引:0,他引:2
Behrman JR Kohler HP Jensen VM Pedersen D Petersen I Bingley P Christensen K 《Demography》2011,48(4):1347-1375
Schooling generally is positively associated with better health-related outcomes—for example, less hospitalization and later
mortality—but these associations do not measure whether schooling causes better health-related outcomes. Schooling may in
part be a proxy for unobserved endowments—including family background and genetics—that both are correlated with schooling
and have direct causal effects on these outcomes. This study addresses the schooling-health-gradient issue with twins methodology,
using rich data from the Danish Twin Registry linked to population-based registries to minimize random and systematic measurement
error biases. We find strong, significantly negative associations between schooling and hospitalization and mortality, but
generally no causal effects of schooling. 相似文献
12.
Bent Jørgensen Hans Chr. Petersen 《Journal of statistical planning and inference》2012,142(5):1215-1224
We review the Fisher scoring and EM algorithms for incomplete multivariate data from an estimating function point of view, and examine the corresponding quasi-score functions under second-moment assumptions. A bias-corrected REML-type estimator for the covariance matrix is derived, and the Fisher, Godambe and empirical sandwich information matrices are compared. We make a numerical investigation of the two algorithms, and compare with a hybrid algorithm, where Fisher scoring is used for the mean vector and the EM algorithm for the covariance matrix. 相似文献
13.
Mads Bonde Ubbesen Liselotte Petersen Preben Bo Mortensen Ole Steen Kristensen 《Children and youth services review》2013
Objective
Placing a child in out-of-home care is one of the most radical measures a child protection system can decide to take. There is an essential interest in understanding the probability of entering care and what circumstances are related to the decision to place a child in out-of-home care. This study investigates the temporal stability of rates and predictors for entry into care.Method
Data were obtained by linking several registration systems. The study population was defined as all children entering care before their third birthday from birth cohorts 1981–2008 (N = 11,034). Furthermore, a control population consisting of a randomly assigned quarter of the Danish child population from the same birth cohorts was used (N = 515,773). Rates of entry and Cox regression models from six periods from 1981 to 2008 were used to model co-variates associated with entry into out-of-home care.Results
The overall likelihood for entering care is found to be decreasing over time. Furthermore, results reveal two trends: relative rates of entry are significantly decreasing for children whose mother has a psychiatric history prior to the child's birth; relative rates are significantly increasing for children whose mother or father was unemployed in the year prior to the child's birth. 相似文献14.
John Bongaarts Susan Greenhalgh Geoffrey McNicoll William Petersen Michael P. Todaro Zachary Zimmer 《Population and development review》2002,28(1):156-164
Books reviewed in this article: Iris Chi, Neena L. Chappell, and James Lubben (eds.), Elderly Chinese in Pacific Rim Countries: Social Support and Integration Wayne A. Cornelius, Thomas J. Espenshade, and Idean Salehyan (eds.), The International Migration of the Highly Skilled: Demand, Supply, and Development Consequences in Sending and Receiving Countries Bimal Ghosh (ed.), Managing Migration: Time for a New International Regime? Institute of Medicine, Forum on Emerging Infections, Emerging Infectious Diseases from the Global to the Local Perspective: Workshop Summary Hans‐Peter Kohler, Fertility and Social Interaction: An Economic Perspective David Kyle and Key Koslowski (eds.), Global Human Smuggling: Comparative Perspectives Brian C. O'Neill, F. Landis Mackellar, and Wolfgang Lutz, Population and Climate Change Neil J. Smelser and Paul B. Baltes (eds.), International Encyclopedia of the Social & Behavioral Sciences Thomas Spira, Nationalism and Ethnicity Terminologies: An Encyclopedic Dictionary and Research Guide, vol. 1 Li Zhang, Strangers in the City: Reconfigurations of Space, Power, and Social Networks within China's Floating Population 相似文献
15.
Build-operate-transfer (BOT) contracting has been widely used in the engineering and construction industry and has recently spread into the service industry domains. Notably, service provider firms from emerging markets, India in particular, are now offering BOT outsourcing contracts in which the client firms are allotted call options, i.e. the right, but not the obligation, to transfer pre-specified assets from the service provider. As such, BOT outsourcing contracts seems to be an interesting contractual novelty that combines the advantages of outsourced and captive offshoring operations. In this paper we investigate under which circumstances a BOT outsourcing contract (i.e. a contract where the client firm exercises its call option) is beneficial, or the opposite, to the emerging market vendor firm. Whether BOT outsourcing contracts are boon or bane to an emerging market vendor basically hinges, we submit, on its internal diffusion of client-specific knowledge and capabilities prior to the execution of the call option. 相似文献
16.
Anthony Gilbert Gloria Lankshear Alan Petersen 《International Journal of Social Welfare》2008,17(1):54-64
Over the past 20 years, research across the developed world has identified trends towards ageing of the population with learning/intellectual disability. Alongside is the recognition that family-carers are also ageing. Recently, the UK government has sought to identify the future housing needs of dependents with intellectual disability residing with older carers. Consequentially, a city council commissioned this qualitative study involving 28 older carers. The findings indicate a need for information about housing options, a lack of practical support and feelings of marginalisation. The conclusions suggest key roles for social services in providing proactive support and advice to family-carers, and a greater degree of joint working between social services departments and housing agencies. These resonate with similar international studies and provide the opportunity to focus on the perspectives of family-carers. Their experiences are real, and if welfare professionals are to work with people with intellectual disability and their family-carers, acknowledging their views is essential. 相似文献
17.
This perspective presents empirical data to demonstrate the existence of different expert views on scientific policy advice on complex environmental health issues. These views are partly research‐field specific. According to scientific literature, experts differ in the way they provide policy advice on complex issues such as electromagnetic fields (EMF), particulate matter (PM), and antimicrobial resistance (AMR). Where some experts feel their primary task is to carry out fundamental research, others actively engage in the policy dialogue. Although the literature provides ideas about expert roles, there exists little empirical underpinning. Our aim is to gather empirical evidence about expert roles. The results of an international study indicated that experts on EMF, PM, and AMR differ in the way they view their role in the policy dialogue. For example, experts differed in their views on the need for precaution and their motivation to initiate stakeholder cooperation. Besides, most experts thought that their views on the risks of EMF/PM/AMR did not differ from those of colleagues. Great dissensus was found in views on the best ways of managing risks and uncertainties. In conclusion, the theoretical ideal–typical roles from the literature can be identified to a certain extent. 相似文献
18.
19.
William Petersen 《Population and development review》2001,27(2):315-322
Two federal agencies have used surnames to classify persons by ethnicity. As two important twentieth‐century examples, names were used to set immigration quotas, and the Census Bureau used names as the defining characteristic of Hispanics. However, many names have been changed and, if unaltered, they are in any case an unreliable index of ethnic identity. 相似文献
20.
Trond Petersen Andrew M. Penner Geir Høgsnes 《Journal of marriage and the family》2010,72(5):1274-1288
The motherhood wage penalty is a substantial obstacle to progress in gender equality at work. Using matched employer–employee data from Norway (1979–1996, N = 236,857 individuals, N = 1,027,462 individual‐years), a country with public policies that promote combining family and career, we investigate (a) whether the penalty arises from differential pay by employers or from the sorting of employees on occupations and establishments and (b) changes in the penalties during a period with major changes in family policies. We find that (a) the penalty to motherhood was mostly due to sorting on occupations and occupation‐establishment units (mothers and nonmothers working in the same occupation and establishment received similar pay), and (b) the wage penalties to motherhood declined substantially over the 18‐year period. 相似文献