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1.
We use a unique firm-level data set including 9000 companies from 26 European Union countries covering four different sectors to take a close look at the relationship between online exports and productivity. The online exporter productivity premium is estimated using different techniques (ordinary least squares, quantile regressions and robust estimation). Results consistently indicate that the estimated online exporter productivity premium is statistically different from zero, positive and significant from an economic point of view. European online exporters, according to these results, are approximately 2% more productive than non-online exporters. Productivity differences between firms could be related to variables that are not included in the empirical model. More research would be needed to address this issue in the future. 相似文献
2.
Measuring volatility with the realized range 总被引:1,自引:0,他引:1
Realized variance, being the summation of squared intra-day returns, has quickly gained popularity as a measure of daily volatility. Following Parkinson [1980. The extreme value method for estimating the variance of the rate of return. Journal of Business 53, 61–65] we replace each squared intra-day return by the high–low range for that period to create a novel and more efficient estimator called the realized range. In addition, we suggest a bias-correction procedure to account for the effects of microstructure frictions based upon scaling the realized range with the average level of the daily range. Simulation experiments demonstrate that for plausible levels of non-trading and bid–ask bounce the realized range has a lower mean-squared error than the realized variance, including variants thereof that are robust to microstructure noise. Empirical analysis of the S&P500 index-futures and the S&P100 constituents confirms the potential of the realized range. 相似文献
3.
Pim Martens 《Futures》2002,34(7):635-648
In this paper, we argue that the concept of transitions is a useful way to address future changes in the health status of the world due to the processes of globalisation. To that end, we discuss the current forces affecting human health and the health transitions we have seen in the past. Next, we describe developments in the health status of populations according to three potential future ‘ages’: the age of emerging infectious diseases, the age of medical technology and the age of sustained health. Future health transitions are explored along the lines of four development paths (scenario groups), defined along two dimensions (global versus regional dynamics and emphasising economic objectives versus environmental and equity objectives). We conclude that managing the health transition effectively will require a micro- and macro-approach, taking into account the social, cultural and behavioural determinants of health. 相似文献
4.
De Economist - We study environmental policy in a stylized economy–ecology model featuring multiple deterministic stable steady-state ecological equilibria. The economy–ecology does not... 相似文献
5.
Valuation judgement bias has been a research topic for several years due to its proclaimed effect on valuation accuracy. However, little is known on the emphasis of literature on judgement bias, with regard to, for instance, research methodologies, research context and robustness of research evidence. A synthesis of available research will establish consistency in the current knowledge base on valuer judgement, identify future research opportunities and support decision-making policy by educational and regulatory stakeholders how to cope with judgement bias. This article therefore, provides a systematic review of empirical research on real estate valuer judgement over the last 30 years. Based on a number of inclusion and exclusion criteria, we have systematically analysed 32 relevant papers on valuation judgement bias. Although we find some consistency in evidence, we also find the underlying research to be biased; the methodology adopted is dominated by a quantitative approach; research context is skewed by timing and origination; and research evidence seems fragmented and needs replication. In order to obtain a deeper understanding of valuation judgement processes and thus extend the current knowledge base, we advocate more use of qualitative research methods and scholars to adopt an interpretative paradigm when studying judgement behaviour. 相似文献
6.
7.
The aim of this paper is to examine valuer judgement behaviour, by exploring the manifestation of task complexity in Dutch commercial valuation practice. For this purpose, we adopted a grounded theory approach and undertook 18 in-depth interviews with senior valuation professionals across the Netherlands. Our findings indicate a strong presence of situational task complexity in commercial valuation practice, as professionals operating in large valuation teams perceive different elements of task complexity throughout commercial valuation practice in comparison to peers working in small valuation teams or self-employed valuers. Further, coping strategies used to deal with task complexity vary substantially by type of valuer as well. From our data, we deducted three types of task environment constructs in which valuers operate, which basically represent the various levels of professional standards required by clients as well as organisational settings composed to meet client standards. As such, we found that task environment settings strongly coincide with perceptions of task complexity. The presence of situational task complexity in commercial real estate valuation practice points to the need for customisation of professional valuer’s development programs to facilitate valuers to deal with task complexity in different stages of valuation practice and hence contribute to advancing valuer judgement skills. 相似文献
8.
Marcel Fratzscher Bert Rürup Jochen Pimpertz Christoph Butterwegge Stephan Leibfried Kerstin Martens Uwe Schimank 《Wirtschaftsdienst》2017,97(5):315-332
Democracy seems to be at risk. People elect populists and autocrats, who offer simple solutions to social problems. Often, these problems are not even real ones but are only perceived as such. Economists have measures to determine which problems are fact-based, but they cannot draw a clear distinction between academic analysis and normative demand. If politics pursues a correction of a market outcome, any normative criteria other than efficiency have to be outlined explicitly. Nevertheless, some authors consider inequality one of the central contemporary social and economic challenges. Marcel Fratzscher emphasises that the solution is not found in more redistribution via taxes and transfers, but rather through greater equality of opportunity and social and educational mobility. Bert Rürup thinks that to stabilise the acceptance of the compulsory pension scheme, the dominance of the equivalence principle should be reduced. Further, the existence of different federal subsidy schemes should be replaced by a fixed federal contribution rate in alignment with the pension expenditures. In an international comparison, the fiscal burden for households with small and mid-level earned incomes is exceptionally high in Germany. In order to reduce this burden, Rürup suggests a contribution-free allowance for the social insurance contributions. 相似文献
9.
Sujit Sur Martin L. Martens 《Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l\u0027Administration》2013,30(4):264-279
This study revisits current practice that ownership holding at IPO has a homogeneous impact on IPO performance. Using signalling theory, we develop and test a conceptual model explaining the relationships between the aggregated ownership structure and IPO price premium. We argue that aggregated ownership has a direct effect on issue price premium, and offer specific hypotheses on the effect of the shares sold during the offering by each type of owner on IPO performance. We use archival data from a sample of US firms that issued IPOs between 1996 and 2000 and find a significant direct effect of ownership configuration, namely, heterogeneity in effect of each ownership type on IPO performance as well as interaction effects between different ownership types. Copyright © 2013 ASAC. Published by John Wiley & Sons, Ltd. 相似文献
10.
Charles H. Cho Martin L. Martens Hakkyun Kim Michelle Rodrigue 《Journal of Business Ethics》2011,104(4):571-587
Astroturf organizations are fake grassroots organizations usually sponsored by large corporations to support any arguments
or claims in their favor, or to challenge and deny those against them. They constitute the corporate version of grassroots
social movements. Serious ethical and societal concerns underline this astroturfing practice, especially if corporations are
successful in influencing public opinion by undertaking a social movement approach. This study is motivated by this particular
issue and examines the effectiveness of astroturf organizations in the global warming context, wherein large corporate polluters
have an incentive to set up astroturf organizations to undermine the importance of human activities in climate change. We
conduct an experiment to determine whether astroturf organizations have an impact on the level of user certainty about the
causes of global warming. Results show that people who used astroturf websites became more uncertain about the causes of global
warming and humans’ role in the phenomenon than people who used grassroots websites. Astroturf organizations are hence successful
in promoting business interests over environmental protection. In addition to the multiple business ethics issues it raises,
astroturfing poses a significant threat to the legitimacy of the grassroots movement. 相似文献