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781.
Jarrett J. Barber Alan E. Gelfand John A. Silander 《Revue canadienne de statistique》2006,34(4):659-676
The authors consider the issue of map positional error, or the difference between location as represented in a spatial database (i.e., a map) and the corresponding unobservable true location. They propose a fully model‐based approach that incorporates aspects of the map registration process commonly performed by users of geographic informations systems, including rubber‐sheeting. They explain how estimates of positional error can be obtained, hence estimates of true location. They show that with multiple maps of varying accuracy along with ground truthing data, suitable model averaging offers a strategy for using all of the maps to learn about true location. 相似文献
782.
Ohne Zusammenfassung
Rede zum 100. Geburtstag auf einer Veranstaltung der Stadt K?ln, der René-K?nig-Gesellschaft und des Westdeutschen Rundfunks
K?ln am 11. Mai 2006 in K?ln 相似文献
783.
PD Dr. Gerd Nollmann 《KZfSS K?lner Zeitschrift für Soziologie und Sozialpsychologie》2006,58(4):638-659
The article tests the thesis that globalization increases the earnings inequality of households. It extends the time series data set of Alderson and Nielsen (2002) who supported the globalization thesis. Alternative models provide no evidence that foreign trade, foreign investment, and migration increase inequality. The article gives reasons for these results and shows that OECD countries pass through an endogenous sectoral and demographic crisis in the transition to post-industrial service societies. Therefore, the paper adapts Kuznets’ theorem of sector dualism to the subsectors of the service economy. The polarization of value addition within the service sector appears as the crucial determinant of increased earnings inequality of households. 相似文献
784.
Are the decisions of American policymakers informed by generaltrends in the publics ideology or by the publicspolicy-specific preferences? In this article we discuss twoexplanations for the types of public opinion information thatpoliticians collect and use. Using a unique data set of privatepolls from the White House of Richard Nixon, we find that whenopinion data on specific policies were available, the presidentrelied on them and not on general ideology data. On less importantissues, however, we find that the president often chose notto collect policy-specific data and instead relied on generalideology data. The differential collection and use of informationby policymakers reflect varying strategic calculations. Theyalso have profound implications for representative democracyand the demands placed on citizens and governors. 相似文献
785.
Abstract The AIDS epidemic was initially thought to be primarily an urban phenomenon. However, migration between rural and urban areas has resulted in the spread of the virus to all segments of the population. Prevention efforts continue to focus on the ABCs of AIDS, namely, abstinence among young adults, being faithful within a monogamous relationship, and/or using condoms at each sexual encounter. We examine the effects of residence, migration status, and selected social and demographic variables on the use of these three practices among men in Zimbabwe, a nation experiencing one of the highest HIV/AIDS prevalence rates in the world. Both residence and migration status were found to be significantly related to safe sex practices. Knowledge of a source with easy access to condoms was the strongest predictor of this behavior. Knowledge of prevention methods and experience with persons with AIDS also exerted significant effects, although not always in the manner hypothesized. Possible reasons for the findings and implications for policy are discussed. 相似文献
786.
In this article we posit that racial discrimination is not uniform across the U.S. labor market. While it is likely that patterns of racial discrimination occur in some types of jobs more than others, little empirical research has examined the effect of race across segmented labor markets. Incorporating two decades of comparable General Social Survey data, this article revisits William J. Wilson's hypothesis that the significance of race in determining labor market outcomes is declining. We examine the effect of race within two dissimilar labor segments over time, dividing the labor market into technique‐versus social‐skills‐oriented segments. Using this theoretically useful dichotomy, we examine if the net effect of race (African American and white men) on occupational prestige has declined from the 1970s to the 1990s. Our multivariate analysis shows that the net effect of race is different in each labor market. This suggests that racial discrimination against African Americans is not uniform across the entire labor market, but instead is differentiately manifested within various labor market segments. Overall, our findings partially support Wilson's thesis indicating that while the effect of race is no longer a significant indicator of occupational prestige by the 1990s in a technique‐oriented job segment, it remains a significant predictive variable within a social‐skills‐oriented job segment, even when controlling for a range of social class and structural variables. 相似文献
787.
Mark J. Schafer 《The Sociological quarterly》2006,47(4):665-691
This study examines school enrollment in two sub-Saharan African nations, Malawi and Kenya. The article advances a refined family economy theoretical framework for understanding variations in school enrollment. It recasts family economy frameworks to consider not only how the household institution mediates a broad social change, but also how the family institution itself may be influenced by a macroinstitutional change. The findings suggest that household structural changes, as well as changes in parents' activities and perceptions, help explain enrollment practices in rural Malawi and Kenya. 相似文献
788.
Susanne Bennett Ph.D. 《Clinical Social Work Journal》2006,34(2):215-226
Clinical implications and ethical dilemmas of the use of confidential case material in clinical writing are examined, including
a review of the discourse among professionals who publish clinical work. This literature is applied to a clinical illustration
of psychotherapy with a client who gave consent for publication and read the clinical write-up of her case material. It is
suggested that clinical writing may increase client “self-reflection” if there is a “secure base” of attachment between therapist/author
and the client. The impact on the client’s treatment process is examined, in addition to a discussion of ethical questions
and professional recommendations.
2Dr. Susanne Bennett is an Assistant Professor, National School of Social Service of the Catholic University of America. Dr.
Bennett is also a psychotherapist in private practice in Falls Church, VA. 相似文献
789.
Dynamic competitive models of industry evolution suggest that firm profit will be more volatile, and turnover lower, in industries with higher sunk costs. These implications are consistent with empirical observation. (JEL L00 ) 相似文献
790.
We specify and estimate a model of the early employment growth of technology-driven new ventures. Our estimated model is derived
from labor demand theory. A data set of 100 German firms is used to conduct this analysis. The study’s findings support the
relevance of the theory as applied to these nascent firms. Employment growth is significantly enhanced in ventures exhibiting
high profits, experienced founders, formal information processes, and outsourced product distribution. Our findings also confirm
aspects of Penrose’s theory of firm growth suggesting that transactions costs associated with larger founder teams may inhibit
employment growth. 相似文献