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41.
    
We provide an empirical framework for assessing the distributional properties of daily speculative returns within the context of the continuous‐time jump diffusion models traditionally used in asset pricing finance. Our approach builds directly on recently developed realized variation measures and non‐parametric jump detection statistics constructed from high‐frequency intra‐day data. A sequence of simple‐to‐implement moment‐based tests involving various transformations of the daily returns speak directly to the importance of different distributional features, and may serve as useful diagnostic tools in the specification of empirically more realistic continuous‐time asset pricing models. On applying the tests to the 30 individual stocks in the Dow Jones Industrial Average index, we find that it is important to allow for both time‐varying diffusive volatility, jumps, and leverage effects to satisfactorily describe the daily stock price dynamics. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   
42.
Certain managerial functions are necessary or of greater importance in certain organizations. The following relations between organization types and leadership roles are hypothesized: expert organizations and producers, bureaucratic organizations and administrators, group organizations and integrators, and task organizations and entrepreneurs. The analysis shows that striving for results and achieving goals (i.e. producer role) is a role requirement that appears in all types of organization, whereas integrating behavior was required as a secondary requirement, again in all four types of organization. It was also found that the union stewards overestimated their leaders’ efficacy as administrators and entrepreneurs, whereas the leaders themselves overestimated their own efficacy as producers and integrators. The leader’s length of service with the organization reduces the inclination towards the producer role, but is conducive to the role of administrator.  相似文献   
43.
This article estimates the Value of Commuting Time (VOCT) among Swedish males in an empirical on-the-job search model. It uses a large sample of employee-establishment linked data obtained from administrative registers. The sample lacks information on mode choice for the journey to work. We therefore estimate a mode choice model on another sample and use this model to link the administrative data to the relevant set of travel times, costs and distances. The VOCT is found to be 1.8 times the net hourly wage rate in the sample. The relatively high estimate results from a high VOCT among cohabiting men.  相似文献   
44.
Knowledge spillovers from a university to the local industry play an important role in high-technology clusters, but we know little about these spillovers. This paper examines empirically the extent of informal contacts between employees in firms and local university researchers in a wireless communications cluster. Furthermore, it analyses the features of an engineer who acquires knowledge from these informal contacts. The university–industry contacts are compared to results for informal contacts between employees in firms. The research shows that the interfirm informal contacts are more numerous than university informal contacts. Likewise, knowledge is more frequently acquired from engineers in other firms than through university–industry contacts. However, not all engineers in the cluster have informal contacts or acquire knowledge through these. Engineers who have participated in formal projects with university researchers and engineers who are educated at the local university have a higher likelihood of acquiring knowledge from informal contacts with university researchers.  相似文献   
45.
Abstract

The present paper proposes and investigates a procedure for numerical evaluation of the transition probabilities for a time-inhomogeneous Markov process when the intensities are known (estimated). The procedure is based on Taylor-expansion of the transition probabilities linked with the Chapman-Kolmogorov equations.  相似文献   
46.
47.
Israel M. Kirzner is the 2006 winner of The International Award for Entrepreneurship and Small Business Research. In this essay, we present and evaluate his main contributions to the economics of entrepreneurship. The focus is on how Kirzner defines the entrepreneurial function. In order to better understand his theory, we posit Kirzner’s notion of an entrepreneur in the Austrian tradition. In so doing we emphasize that this concept opens up different perspectives as compared to the neoclassical theoretical framework. The three areas of economic policy, justice and freedom, and economic growth are discussed. We also show why the Kirznerian entrepreneur makes these issues relevant. Perhaps most importantly, Kirzner has made the Austrian School intelligible for non-Austrians. By bridging the chasm between Austrian and mainstream thinking, the crucial role of entrepreneurship and the individual entrepreneur has become visible to a much broader audience.  相似文献   
48.
    
This paper introduces a novel consumption-based variable, cyclical consumption, and examines its predictive properties for stock returns. Future expected stock returns are high (low) when aggregate consumption falls (rises) relative to its trend and marginal utility from current consumption is high (low). We show that the empirical evidence ties consumption decisions of agents to time variation in returns in a manner consistent with asset pricing models based on external habit formation. The predictive power of cyclical consumption is not confined to bad times and subsumes the predictability of many popular forecasting variables.  相似文献   
49.
    
This article examines deliberative, emotional, and sociocultural processes in consumption. The authors draw upon basic processes from two leading theories in social psychology, the theory of planned behavior (TPB) and the model of goal‐directed behavior (MGB), to develop a comprehensive approach to decision making more appropriate for many consumption decisions, and revise the representation and modeling of key variables to better reflect how social psychological processes relate to consumer behavior. A survey was conducted among real adult consumers of bacalhau in Portugal. Because it is most common for women to prepare bacalhau meals in Portugal, 153 female participants were recruited for this survey. The results show that the TPB, and especially the MGB, are found to explain food consumption decisions well but only after the approaches are modified in form and content to accommodate the complex emotional and social aspects of the consumption context. The results also show that the effects of key determinants of desire in the MGB are contingent on the traits of food involvement and cultural orientation (i.e., degree of vertical individualism). The approach taken herein overcomes limitations of existing theories by synthesizing relevant processes across two leading theories and by introducing new variables and processes, thereby showing that the organization of these processes and their contingency on cultural variables regulate consumption.  相似文献   
50.
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