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71.
This paper studies the implementation of the coupling from the past (CFTP) method of Propp and Wilson (1996) in the set-up of two and three component mixtures with known components and unknown weights. We show that monotonicity structures can be exhibited in both cases, but that CFTP can still be costly for three component mixtures. We conclude with a simulation experiment exhibiting an almost perfect sampling scheme where we only consider a subset of the exhaustive set of starting values. 相似文献
72.
PD Dr. Christian Lüdemann 《KZfSS K?lner Zeitschrift für Soziologie und Sozialpsychologie》2001,53(3):547-568
In this study the attitude towards the new nationality law in Germany is explained by a value/expectancy theory of attitude. 215 standardized face-to-face-interviews were performed with a quota sample. The results of this survey show that the value and expectancy theory of attitude is extremely successful in explaining the attitude towards the new nationality law. Models explaining the predictor variable of the attitude theory and a feedback-model were tested. 相似文献
73.
Dr. Gerald Eisenkopf Prof. Dr. Christian Lukas 《Zeitschrift für Betriebswirtschaft》2010,80(7-8):821-839
The paper analyzes different selection policies in education and business. We show that incorrect self-perceptions combined with imperfect performance measurement may cause significant welfare losses in selective educational systems, in particular if selection starts too early. Of course, these welfare losses can be mitigated by an investment in better ability assessment. However, an affirmative action policy could serve the same purpose as such an investment. We apply our analysis also to diversity management in firms. Based on positive discrimination we establish an efficiency argument for diversity management. 相似文献
74.
This paper presents a review of empirical research on the impact of acquisitions on firm performance. The evidence suggests that, in the short run, acquisitions have at best an insignificant impact on shareholder wealth. Long‐run performance analysis reveals overwhelmingly negative returns, while the evidence using accounting performance measures is mixed. The review also examines the impact of bid characteristics on performance. The acquisition of hostile targets, transactions that are paid for with cash and acquisitions of larger targets are associated with superior (or at least less negative) performance, while there is mixed evidence on the benefits of related acquisitions. A number of recent studies find that acquirers with superior pre‐bid performance tend to experience significant underperformance in the post‐bid period. 相似文献
75.
Time series of counts occur in many fields of practice, with the Poisson distribution as a popular choice for the marginal process distribution. A great variety of serial dependence structures of stationary count processes can be modelled by the INARMA family. In this article, we propose a new approach to the INMA(q) family in general, including previously known results as special cases. In the particular case of Poisson marginals, we will derive new results concerning regression properties and the serial dependence structure of INAR(1) and INMA(q) models. Finally, we present explicit expressions for the distribution of jumps in such processes. 相似文献
76.
Judgment aggregation without full rationality 总被引:1,自引:1,他引:0
Several recent results on the aggregation of judgments over logically connected propositions show that, under certain conditions,
dictatorships are the only propositionwise aggregation functions generating fully rational (i.e., complete and consistent)
collective judgments. A frequently mentioned route to avoid dictatorships is to allow incomplete collective judgments. We
show that this route does not lead very far: we obtain oligarchies rather than dictatorships if instead of full rationality
we merely require that collective judgments be deductively closed, arguably a minimal condition of rationality, compatible
even with empty judgment sets. We derive several characterizations of oligarchies and provide illustrative applications to
Arrowian preference aggregation and Kasher and Rubinstein’s group identification problem.
This paper was circulated in August 2006 and presented at the Yale workshop on Aggregation of Opinions, September 2006, at
the Centre interuniversitaire de rechere en économie quantitative, Montreal, October 2006, and at the 1st International Workshop
on Computational Social Choice, Amsterdam, December 2006. We are grateful to the participants at these occasions and the anonymous
referees for comments. We also thank Ton Storcken for discussion. Elad Dokow and Ron Holzman have independently proved closely
related results, which were also presented at the Yale workshop in September 2006, and circulated in the December 2006 paper
(Dokow and Holzman 2006). 相似文献
77.
78.
Christian Klesse 《The Sociological review》2007,55(3):571-591
This article explores discourses on non‐monogamy in relationship manuals published in the 1980s and 1990s for gay men from a perspective of governmentality. A distinctive feature of relationship manuals for gay men is the presentation of (non‐) monogamy as a matter of choice and negotiation. However, within this paradigm, most manuals problematise recreational, casual, or non‐relational sex or relationships with multiple partners through a set of discourses around the concepts intimacy, maturity, addiction and compulsion. The normative ideal of a successful gay male partnership is fleshed out in the provision of narrative schemata based on stage model theories which naturalise white middle class relationship experiences and concerns. Governmental rationality thereby enfolds itself in an interplay of several strategies including psychologisation, individualisation, normalisation, problematisation, and responsibilisation. 相似文献
79.
Barry T. Hirsch 《Journal of Labor Research》2004,25(2):233-266
I examine evidence on private sector union wage gaps in the United States. The consensus opinion among labor economists of
an average union premium of roughly 15 percent is called into question. Two forms of measurement error bias downward standard
wage gap estimates. Match bias results from Census earnings imputation procedures that do not include union status as a match
criterion. Downward bias is roughly equal to the proportion of workers with imputed earnings, currently about 30 percent.
Misclassification of union status causes additional attenuation in union gap measures. This bias has worsened as private sector
density has declined, since an increasing proportion of workers designated as union are instead nonunion workers. Corrections
for misclassification and match bias lead to estimated union gaps substantially higher than standard estimates, but with less
of a downward trend since the mid 1980s. Private sector union gaps corrected for these biases are estimated from the CPS for
1973–2001. The uncorrected estimate for 2001 is .13 log points. Correction for match bias increases the gap to .18 log points;
further correction for misclassification bias, based on an assumed 2 percent error rate, increases the gap to .24. Reexamination
of the skill-upgrading hypothesis leads to the conclusion that higher union gap estimates are plausible. The conventional
wisdom of a 15 percent union wage premium warrants reexamination. 相似文献
80.
Andrej Christian Lindholst 《Planning Practice and Research》2015,30(4):376-392
Although the term ‘quality’ has a universal positive connotation and typically is framed by a focus on improvements, its application includes as well as excludes the access, values and world views of particular actors and interests. In this article, we highlight the relevance and implications of such ‘inherent politics’ through a case study of a widespread approach to operationalizing quality in urban green space management. We conclude that adoption of any quality model has both limiting and enabling implications for public participation and decision-making and that a critical stance is needed within both research and practice for the development of quality models that connect to values of broader societal relevance. 相似文献