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1.
Hahn [Hahn, J. (1998). On the role of the propensity score in efficient semiparametric estimation of average treatment effects. Econometrica 66:315-331] derived the semiparametric efficiency bounds for estimating the average treatment effect (ATE) and the average treatment effect on the treated (ATET). The variance of ATET depends on whether the propensity score is known or unknown. Hahn attributes this to “dimension reduction.” In this paper, an alternative explanation is given: Knowledge of the propensity score improves upon the estimation of the distribution of the confounding variables. 相似文献
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Markus Hassler 《全球网;跨国事务杂志》2003,3(4):513-531
The global organization of the clothing industry has been the prime example of buyer‐driven commodity chains. However, previous empirical studies to substantiate Gereffi's assertion have been highly Western centric and predominantly based on the empirical evidence of American retailers and brand name companies. In this article I demonstrate that any clothing commodity chain has various influential factors, such as the national and global regulatory framework, the societal context of the leading firm, the fashion context of the products, as well as the actual brand ownership. Thus, the organization of clothing firms in the global economy can develop diverse intra‐sectoral commodity chain coordinations. Using a hypothetical clothing commodity chain as an example, I attempt to identify the individual commodity chains within which Indonesian clothing firms are embedded. Furthermore, I outline the ways in which Indonesian clothing firms were affected by the economic crisis of the late 1990s. 相似文献
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5he purpose of this study was to determine whether or not suspected variables affected a surgery clerk's chances of being awarded an honor rating. Findings indicated a significant relationship between a student receiving an honor rating and his or her preceptor's predetermined level of student advocacy, the number of completed patient interview and physical examination write-ups, and final examination scores. There was no significant relationship found between honor ratings and the preceptor's status, the sequence in which the student was discussed or the length of time spent discussing the student at the final evaluation meeting, or the number of clinical faculty present at the meeting. These results lend support to the faculty forum evaluation approach, but suggest a need for further scrutiny of some influencing variables to ensure all students are fairly considered and honor ratings judiciously awarded. 相似文献
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Markus Ebner 《Organisationsberatung, Supervision, Coaching》2017,24(3):269-282
The effect of a positive day reflection as a technique of positive psychology has been found repeatedly. The qualitative study is based on a sample of 74 participants and shows which kind of experiences people make during and after this exercise. For this purpose, participants were instructed to reflect their day based on four specific questions (4-Evening-Questions) every evening over a period of two weeks. Subsequently, individual experiences were collected and analyzed qualitatively. The results show that the exercise leads to a sensitization of perception, a change in the interpretation of situations as well as in one’s own actions. 相似文献
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Fink Matthias Hatak Isabella Scholz Markus Down Simon 《Review of Managerial Science》2020,14(2):335-343
Review of Managerial Science - Third-party funding of academic research has grown rapidly in its scope and impact. However, several forces demand greater attention to potential opportunities,... 相似文献
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As Germany’s representative 2006 Survey of the International Social Justice Project clarifies, intergenerational justice and financing of future pensions are seen as central problems of Germany’s state pension system by a vast majority. Despite this common perception, proposals for reform that address the issue of intergenerational justice directly at the institutional level are extremely unpopular. Moreover, concrete constitutive elements of the state pensions system, like the amount of contributions, the amount of benefits and the principle of status-conservation are seen as largely fair. As mechanisms driving this preference for the status quo, anchoring effects, loss aversion and socialization are proposed and tested empirically via factorial survey methods. Results indicate that arbitrary settings (anchors) determine what people regard as a just pension irrespective of individual justice standards. Furthermore, loss aversion can help explain why individual worries about economic status in old age overlay consideration of exchange relations between the young and the old within the pensions system. As a result, potential benefits of reform are hardly recognized. Finally, former institutional settings prove to be formative for ideas of justice in the long run. Even under the condition of comparable economic interests, Germans from the former GDR expect a more egalitarian distribution of pensions, whereas Western Germans strongly favor allocation according to status criteria. 相似文献
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Consistent with a new genre of research on life-course analyses of health-service use, this study explores the consequences of long-term exposure to a risk factor. Drawing from cumulative-disadvantage theory, the study examines whether obesity, especially chronic obesity, increases hospitalization admission and length of stay. Analyses make use of hospital records abstracted over 20 years from a national survey of adults 41 to 77 years of age at baseline (n = 4,574). Multiple measures of body weight are used to calculate adult obesity duration. Results reveal that obesity increased hospital admissions and length of stay over the 20 years studied. Among persons obese at any time during the study, years of obesity also led to longer stays. The findings highlight the utility of measures of the duration of risk exposure for both life-course studies of health and tests of cumulative-disadvantage theory. 相似文献
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Markus Nesselrodt 《East European Jewish Affairs》2016,46(1):47-67
ABSTRACTAn estimated 230,000 Polish Jews escaped Nazi persecution during World War II by flight or deportation to the interior of the Soviet Union. This article examines early postwar Yiddish and Polish sources on their survival in Soviet exile such as poems, newspaper articles, and witness testimonies. Two sets of sources are analyzed in-depth, testimonies written by young people in Jewish Displaced Persons (DP) camps in occupied Germany and Yiddish poetry from Poland and the DP camps. The author argues that many former exiles were eager to write down their experiences. In doing so, they were aware of the complex nature of deportation and flight that characterized the experiences of Polish Jews in the Soviet Union. In their testimonies many young witnesses express their understanding that they too were “marked by the khurbn.” Whereas Yiddish poetry from the same period helps us understand how writers dealt with their own story of wartime survival outside the realm of German persecution. In their poetry they seek meaning in their own suffering and express their desire to establish a dialogue with other survivors. 相似文献