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1.
Die Wettbewerbssituation auf dem deutschen Bahnmarkt ist vielschichtig: Sowohl die verschiedenen Teilsegmente des Bahnmarktes als auch der intermodale Wettbewerb müssen berücksichtigt werden. Dabei besteht die Gefahr, die Wettbewerbsposition des gesamten Eisenbahnverkehrs gegenüber anderen Verkehrstr?gern aus den Augen zu verlieren. 相似文献
2.
Major contributors to the obesity epidemic are societal and result from sedentary lifestyles and consumption of high-calorie diets. Previous studies suggest that food choice behavior is socially transmissible. Hence, knowledge of the impact of social influence on calorie intake is critical to improve the understanding about the outcomes of policies related to healthful diets. There is the need to analyze the influence of social networks on choosing food in a public place. Thus, we interviewed groups of food court patrons in an all-you-can-eat college dining hall. Results show individuals dining in a group with at least one obese group member are consuming more calories from high-calorie foods and fewer calories from low-calorie foods. Food-related interactions in a group influenced food consumption. Hence, dining with obese peers likely increases calorie intake. 相似文献
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Appropriate real‐time forecasting models for the US retail price of gasoline yield substantial reductions in the mean‐squared prediction error (MSPE) at horizons up to 2 years as well as substantial increases in directional accuracy. Even greater MSPE reductions are possible by constructing a pooled forecast that assigns equal weight to five of the most successful forecasting models. Pooled forecasts have lower MSPE than the US Energy Information Administration gasoline price forecasts and the gasoline price expectations in the Michigan Survey of Consumers. We also show that as much as 39% of the decline in gas prices between June and December 2014 was predictable. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
5.
Career mentoring in context: A multilevel study on differentiated career mentoring and career mentoring climate 下载免费PDF全文
Annelies E. M. Van Vianen Doris Rosenauer Astrid C. Homan Christiane A. L. Horstmeier Sven C. Voelpel 《人力资源管理》2018,57(2):583-599
This study explores how supervisor career mentoring contributes to contemporary organizational career development, which strives to foster employees' promotability while strengthening their intention to stay. Specifically, we focus on the implications of career mentoring in team contexts. Applying a multilevel framework, we distinguish between individual‐level differentiated mentoring (i.e., an employee's mentoring perceptions as compared to those of other team members) and group‐level career mentoring climate (i.e., the average perception across all group members). In a workplace setting, we collected data from vocational job starters (N ranged from 230 to 290) and their company supervisors (N ranged from 56 to 68). We find that career mentoring climate positively relates to promotability, more so than differentiated career mentoring. Both career mentoring climate and differentiated career mentoring are positively related to the intention to stay. At the individual level, this relationship is mediated by job satisfaction. We discuss theoretical and practical implications of differentiated and group‐level mentoring. 相似文献
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Christiane Hellmanzik 《European Economic Review》2010,54(2):199-90
This paper shows that ‘location matters’ in terms of premiums on creative clusters and peak ages. The analysis is based on the 214 most prominent modern visual artists born 1850-1945 and the art clusters of Paris and New York. Auction records of the past 20 years are used to estimate the value of artworks over an artist's career. The overall cluster premium for paintings produced in Paris and New York is found to be 11% and 43%, respectively; paintings made in Paris during the First World War have a premium of 14% while those produced between 1946 and 1975 have a premium of 27%. New York offers premiums for paintings produced there for all periods after the First World War, peaking at 74% between 1946 and 1975. When decomposing this premium, we find that quality rather than quantity of artists in the location is driving the results. It is argued that artists working in a cluster location reach a peak in the age-price profile of their work significantly earlier than artists working elsewhere. 相似文献
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Hilde Christiane Bjørnland 《Empirical Economics》2000,25(3):369-392
This paper analyses the stylized facts of business cycles in Norway, by comparing different detrending methods. As the choice
of the appropriate data transformation depends on the nature of the underlying dynamic properties of the time series, a set
of unit root tests are first applied to the data. The detrended data are analysed, both in the time domain and the frequency
domain. The evidence suggests that whereas some variables (e.g. consumption and investment) behave consistently procyclically
with GDP, for other variables (e.g. real wage and prices), the business cycle properties vary considerably with the detrending
methods used. The results are evaluated from a real business cycle perspective, but overall, there is little evidence to support
a (supply driven) real business cycle. Symmetries in business cycles are finally analysed by comparing the business cycles
in Norway and selected countries.
First version received: April 1997 / Final version received: November 1999 相似文献
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Until now the promotion of renewable energies in Europe has been effected on the basis of different promotion systems of the Member States. Currently the EU-wide harmonisation of the promotion systems, from which yields of efficiency and a higher effectiveness are expected, cannot be enforced due to a discordance concerning the “right” promotion instrument.With the proposal for a directive on the promotion of renewable energies, published at the 23. January in 2008, the European Commission attempts to make a first move towards harmonisation. Besides existing promotion systems it will be possible to transfer Guarantees of Origin for renewable energies between Member States. Since, however, some Member States expect negative effects as a consequence of opening their markets the proposal comprises opportunities to restrict the transfer. The present scope of interpretation within the proposal allows for different options concerning the design of the transfer restrictions. These will be identified, analysed, and subsequently evaluated in this article. Despite of both extreme options, the possibility to entirely opt out of the transfer system and the obligation to completely participate in the transfer system, two further hybrid options are discussed. The latter are characterised by the possibility of Member States to restrict the transfer of Guarantees of Origin to a certain extent through a “system of prior authorisation”. 相似文献
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