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901.
Richard K. Lester 《Production and Operations Management》1995,4(3):187-194
A nationwide research program on the performance of American industry, sponsored by the Alfred P. Sloan Foundation, now involves scores of faculty researchers and more than 100 graduate students at several American universities. Ten research centers have been established, and each one is dedicated to the study of a particular industry. An eleventh center is carrying out research on problems that cut across these industries. It is expected that the Sloan Industry Studies program will make useful contributions to the performance of the industries themselves, to policymaking at all levels of government, and to the development of interdisciplinary research communities within the universities. 相似文献
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903.
Limited research has been conducted on the needs and concerns of older lesbians in the American population. The purpose of this paper is to present findings from a qualitative study of older (aged 55 and older) lesbians' experiences of and perspectives on aging, with a focus on their discussions of social support. Through an in-depth qualitative study with 25 older lesbians, we found that aging lesbians may be less likely to access formal social services due to perceptions of bias within the services and a potential lack of connection with those who do use services. However, participants were creative at formulating informal networks of support. Four heuristic categories (empowered, secure, independent, and precarious) of informal social support were developed to characterize the various ways in which participants configured their support systems. Social support within each category was conceptualized both in terms of intentionality and degree of connectedness. Being partnered did not necessarily equate with a strong sense of social support. Further research needs to be conducted on older lesbians in order to better characterize and respond to their needs as they age. 相似文献
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905.
906.
Ayse Yildiz Julie Dickinson Jacqueline Priego-Hernández Richard Teeuw 《Risk analysis》2023,43(4):747-761
While children are one of the groups at risk in disasters, they can also take an active part in disaster management, provided that the opportunity is given. This research examined the effect of disaster experience, disaster education, country, and city socioeconomic status on children's perceived risk and preparedness with a survey of 1335 children between 11 and 14 years old, in Nepal and Turkey. The survey used questionnaires and the pictorial representation of illness and self measure (PRISM) tool. Results showed that (1) children's risk perceptions were in line with their country-specific objective risks; (2) there were differences between the countries in relation to perception of risk for all the hazards except wildfire; (3) socioeconomic status had a statistically significant effect on children's perceptions of risk and preparedness for earthquakes, wildfires, that is, children who live in wealthier places had higher perceived risk and preparedness; (4) children in both countries showed similar trends in their knowledge of the correct protective actions to take in the event of a hazard occurrence. However, there is still room to enhance children's knowledge, in terms of safety behaviors, as the children selected many incorrect protective actions. There are important implications in terms of child-centered disaster management which hopefully will make life safer and help to create more resilience to disaster in society as a whole. 相似文献
907.
Whitney K. Newey Richard J. Smith 《Econometrica : journal of the Econometric Society》2004,72(1):219-255
In an effort to improve the small sample properties of generalized method of moments (GMM) estimators, a number of alternative estimators have been suggested. These include empirical likelihood (EL), continuous updating, and exponential tilting estimators. We show that these estimators share a common structure, being members of a class of generalized empirical likelihood (GEL) estimators. We use this structure to compare their higher order asymptotic properties. We find that GEL has no asymptotic bias due to correlation of the moment functions with their Jacobian, eliminating an important source of bias for GMM in models with endogeneity. We also find that EL has no asymptotic bias from estimating the optimal weight matrix, eliminating a further important source of bias for GMM in panel data models. We give bias corrected GMM and GEL estimators. We also show that bias corrected EL inherits the higher order property of maximum likelihood, that it is higher order asymptotically efficient relative to the other bias corrected estimators. 相似文献
908.
在提前订购和延时采购两种情景下,分别考虑最大化期望收益和最小化违约概率两种决策目标,对受资金约束零售商的最优采购量和相匹配的融资策略进行分析,结果表明,相比于以最大化期望收益为决策目标,以最小化违约概率为决策目标的零售商在提前订购中将奉行"保守"的采购量和融资策略(仅耗尽自有资金量采购而不融资),而在延时采购中采取"激进"的采购量和融资策略(与最大化期望收益下一致);在此基础上,对不同决策目标下受资金约束零售商的最优采购时机问题进行研究发现,在最大化期望收益下,零售商的最优采购时机由产品采购成本、市场容量均值、市场容量方差、自有资金量、银行贷款利率等多个参数共同决定,而在最小化违约概率下,零售商将始终选择延时采购。 相似文献
909.
Richard A. Courtney 《Journal of Management and Governance》2018,22(3):689-705
This article examines an AHRC ‘Co-Design and Co-Production’ project focussed on the decision-making processes within the ‘heritage ecology’. The project involved three UK universities and a range of heritage institutions and community organisations. The project set out to empower community organisations through an emphasis upon deliberative democracy. Heritage is conceptualised as public value because it is used to define identity and belonging in civil society. Network governance theory is used to characterise the operational capabilities and the decision-making environment in the heritage ecology. The article argues that the public value of heritage is realised through network governance when ‘human elements’, such as emotional value are authentically and legitimately represented in deliberative processes. 相似文献
910.
Richard C. Barnett Joydeep Bhattacharya Mikko Puhakka 《Journal of population economics》2018,31(3):703-746
We directly compare two institutions, a family compact—a parent makes a transfer to her parent in anticipation of a possible future gift from her children—with a pay-as-you-go, public pension system, in a life cycle model with endogenous fertility wherein children are valued both as consumption and investment goods. Absent intragenerational heterogeneity, we show that a benevolent government has no welfare justification for introducing public pensions alongside thriving family compacts since the former is associated with inefficiently low fertility. This result hinges critically on a fiscal externality—the inability of middle age agents to internalize the impact of their fertility decisions on old-age transfers under a public pension system. With homogeneous agents, a strong-enough negative aggregate shock to middle-age incomes destroys all family compacts, and in such a setting, an optimal public pension system cannot enter. This suggests the raison d’être for social security must lie outside of its function as a pension system—specifically its redistributive function which emerges with heterogeneous agents. In a simple modification of our benchmark model—one that allows for idiosyncratic frictions to compact formation such as differences in infertility/mating status—a welfare-enhancing role for a public pension system emerges; such systems may flourish even when family compacts cannot. 相似文献