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81.
Brad Stone 《经理人》2010,(8):26-26
谷歌计划今年夏季展开人们期待已久的进军电子书市场行动,该项目名为“谷歌版图书”。谷歌没有透露任何具体细节,只是表示将销售用互联网浏览器即可阅读的电子书。 相似文献
82.
The use of narrative assessments in mental health research with young children has increased significantly over the last 15 years.
This article reviews 13 empirically validated narrative assessments for preschool populations. The reviewed instruments assess
children’s attachment relationships, moral values, separation anxiety, pro-social behavior, object relations and depression,
among other constructs. The authors present an analysis of each instrument including a discussion of its methodological rigor,
and point to needed directions in the field. These narrative assessment instruments provide researchers and clinicians with
insight into the internal worlds of young children, offering windows into a difficult-to-assess population. 相似文献
83.
The Economic Reward for Studying Economics 总被引:1,自引:0,他引:1
Undergraduate advisors in economics departments suggest that the study of economics is good preparation for a variety of careers, including economics, consulting, analysis, and administration, and they argue that economics is a solid prelaw or pre-MBA major. In this article we provide some empirical evidence about each of these contentions. We find that among college graduates who do not earn advanced degrees, economics majors generally earn more than similar individuals with other majors. We show also that among individuals who pursue graduate degree programs in business and law, economics majors earn more than undergraduate majors in most other academic disciplines. 相似文献
84.
The political economy model has been widely and effectively used to explain and predict adoption rates of highly salient and/or controversial policies in the American states. However, use of this model to predict policy adoption in noncontroversial domains has been limited. This article tests the extent to which the model is successful in explaining the adoption of less-salient, everyday policies intended to improve environmental quality among the American states. The addition of conditional terms related to the model's political and bureaucratic components resulted in explaining 57% of the variance in commitment to everyday environmentalism among the American states. In sum, the number of everyday environmental policies adopted by state governments is a function of economic considerations, legislative accountability and professionalism, bureaucratic commitment, political culture and previous levels of policy adoption. Alternately—and unlike more controversial environmental policy domains—partisanship, ideology, party control of government and interest group forces do not have an impact on adoption of everyday environmental policies. 相似文献
85.
This paper presents results from a simulation study motivated by a recent study of the relationships between ambient levels of air pollution and human health in the community of Prince George, British Columbia. The simulation study was designed to evaluate the performance of methods based on overdispersed Poisson regression models for the analysis of series of count data. Aspects addressed include estimation of the dispersion parameter, estimation of regression coefficients and their standard errors, and the performance of model selection tests. The effects of varying amounts of overdispersion and differing underlying variance structure on this performance were of particular interest. This study is related to work reported by Breslow (1990) although the context is quite different. Preliminary work led to the conclusion that estimation of the dispersion parameter should be based on Pearson's chi-square statistic rather than the Poisson deviance. Regression coefficients are well estimated, even in the présence of substantial overdispersion and when the model for the variance function is incorrectly specified. Despite potential greater variability, the empirical estimator of the covariance matrix is preferred because the model-based estimator is unreliable in general. When the model for the variance function is incorrect, model-based test statistics may perform poorly, in sharp contrast to empirical test statistics, which performed very well in this study. 相似文献
86.
Using the group engagement model, we hypothesize that two differentiated leadership constructs – LMX differentiation at the group level and a new construct, LMX relational separation, at the individual-within-group level – interact with LMX to affect follower citizenship behaviors (OCB) and turnover intentions. Data from 223 followers and their leaders situated across 60 workgroups demonstrate that the effects of individual perceived LMX quality are contingent upon a group's overall variability in LMX (i.e., LMX differentiation) and employees' similarity in terms of LMX with their coworkers (i.e., LMX relational separation). Specifically, the effects of high quality LMX relationships on OCB and turnover intentions are weaker when group LMX differentiation or employees' LMX relational separation is higher, rather than lower. Our findings contribute to a growing stream of multilevel LMX research incorporating climate effects and offer an alternative view of differentiated leadership in groups. Key implications for theory and practice are discussed. 相似文献
87.
88.
B. Lindsay Lowell 《Population research and policy review》2001,20(6):608-608
Authors Index
Author Index Volume 20 (2001) 相似文献89.
90.
We analyze the relationship between professional sports events and concerts held in LA's Staples Center and nearby hotel performance. Government‐led economic redevelopment projects often envision sports facilities as tourist magnets. Little evidence exists supporting links between sporting events and hotel demand. An empirical analysis exploiting exogenous daily variation in the timing of games and concerts from 2002 to 2017 shows a small positive impact on room revenue at hotels within one mile and larger room revenue decrease at hotels located one to 4 miles away. The overall impact on hotel room revenue and rooms rented was not positive. Nearby hotel room rates increased during NBA and NHL work stoppages. The city granted four new hotels built very near the arena exemptions from occupancy taxes for 20–25 years; these exemptions reduced hotel tax revenues by a minimum of $4.5 million annually and may not have been needed to spur new hotel development. (JEL H26, H71, Z28) 相似文献