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91.
Jeffrey A. Alexander Maureen E. Comfort Bryan J. Weiner 《Nonprofit management & leadership》1998,8(4):311-332
This review of the governance practices of twenty-five public-private partnerships involved in addressing a broad range of community health needs shows that governance in public-private community partnerships departs significantly from traditional notions of institutional governance. Governance structures and degrees of progress toward governance goals vary widely and appear to be systematically related to the organization, composition, location, and activity of each partnership. 相似文献
92.
McKelvey [4] proved that for strong simple preference aggregation rules applied to multidimensional sets of alternatives, the typical situation is that either the core is nonempty or the top-cycle set includes all available alternatives. But the requirement that the rule be strong excludes, inter alia, all supermajority rules. In this note, we show that McKelvey's theorem further implies that the typical situation for any simple rule is that either the core is nonempty or the weak top-cycle set (equivalently, the core of the transitive closure of the rule) includes all available alternatives. Moreover, it is often the case that both of these statements obtain. Received: 13 October 1997/Accepted: 24 August 1998 相似文献
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94.
Urbanization is rapidly changing the southeastern US landscape, particularly in Georgia within and around the Atlanta metropolitan area, the fastest-growing Southeastern population center. Landscape characteristics related to human disturbance, landscape composition, and landscape configuration vary across the urban-rural gradient and are easily and inexpensively evaluated using geographic information systems (GIS). Previous studies have suggested that avian communities and populations respond in scale-dependent ways to urbanization-related landscape changes through changes in abundance and diversity. We conducted a 2-year study (2007?C2008) of the response of breeding bird population abundance, community abundance, species richness, and relative diversity in young and mature single-family residential areas to 15 landscape characteristics measured at multiple spatial scales across urban-rural development intensity gradients near Athens, Georgia. We grouped birds by species, entire site assemblage, and by functional guild affiliation. Our models suggest strong relationships between the landscape and both community and population abundance of birds, as well as a somewhat weaker relationship with species richness. We detected only a weak relationship between breeding season relative diversity and landscape characteristics; we hypothesize a possible seasonal component to that relationship based on an earlier study. Our results suggest that widely available geospatial metrics of human disturbance and landscape pattern can be used to model breeding bird abundance and diversity across urban-rural gradients. This study sets the framework for a landscape scale understanding of the effects of housing developments and development intensity on breeding birds in northeastern Georgia and such a landscape-based approach to modeling species numbers represents a valuable tool in natural resources management. 相似文献
95.
Jeffrey Penney 《Economic inquiry》2018,56(2):1244-1260
Using data from a large‐scale two‐stage experiment wherein students and teachers were randomized at both kindergarten entry and first grade to be sorted into classes either with or without full‐time teacher's aides, I estimate an econometric model that is uniquely suited to take advantage of this design to determine their effect on academic achievement. The identification strategy produces fully nonparametric dynamic average treatment effects for every treatment path. I find that the use of full‐time teacher's aides increases student achievement, but the benefits appear to accrue mostly to those of higher socioeconomic status and to White students. A cost‐benefit analysis shows that full‐time teacher's aides may be a competitive alternative to class size reductions in terms of net social benefits. (JEL I21, I28) 相似文献
96.
Examination of the relationships between dietary restraint,alcohol, and adverse problems among women
Laura J. Buchholz Janis H. Crowther Jeffrey A. Ciesla 《Journal of American college health : J of ACH》2018,66(5):384-392
Objective: Women who report greater chronic dieting consume more alcohol, drink more frequently, and experience greater problems than women who report less chronic dieting. Alcohol may also temporarily disrupt a woman's dietary rules, leading to increased caloric intake and subsequent restriction. This study examined whether alcohol use mediated the relationship between dietary restraint and alcohol problems in a woman's daily life. Participants: Women (N = 59) completed the study by the fall of 2013. Methods: Participants completed up to six assessments for 10 days, including intended dietary restraint, alcohol use, and problems. Results: Drinking quantity partially mediated the relationship between dietary restraint and alcohol problems. For each drink consumed, there was a 1.4 times greater likelihood of eating after drinking, which was associated with greater intention to subsequently restrict calories. Conclusions: The types of drinks consumed and reasons for restricting one's caloric intake may inform the relationship between these behaviors. 相似文献
97.
98.
Patrick Heuveline Hongxing Yang Jeffrey M. Timberlake 《Journal of marriage and the family》2010,72(5):1362-1376
Research in the United States has shown that children growing up in 2‐parent households do better in school than children from single‐parent households. We used the Trends in International Mathematics and Science Study (TIMSS) data to test whether this finding applied to other countries as well (N = 100,307). We found that it did, but that the educational gap was greater in the United States than in the other 13 countries considered. Results from 2‐level hierarchical linear models demonstrated that international differences in the educational gap were associated with several indicators of national policy and demographic contexts. No single policy appeared to have a large effect, but several policy combinations were associated with substantially reduced educational gaps between children from different family structures. 相似文献
99.
Sheri Lokken Worthy Jeffrey Jonkman Lynn Blinn-Pike 《Journal of Family and Economic Issues》2010,31(2):161-170
College students are at especially high risk for serious financial problems due to easy availability of credit cards, rising tuition, and a declining economy. Arnett (Am Psychol 55:469–480, 2000) proposed 18–25 year olds may be considered emerging adults and are characterized by less stable financial situations than those who perceive themselves to be adults. A survey was given to 450 students at two Mississippi universities. The results showed student financial behaviors were related to age, gender, public assistance, adult status, sensation-seeking, and potential for problem gambling. This study is unique in that it investigated the relationship of emerging adult/adult status and other individual and socio-demographic variables to financial behaviors among college students, a conceptualization that has not been explored in the past. 相似文献
100.
Theory and Society - Sociologists of education often emphasize goods that result from a practice (external goods) rather than goods intrinsic to a practice (internal goods). The authors draw from... 相似文献