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131.
Johannes Münster 《Managerial and Decision Economics》2007,28(8):849-862
Perfectly discriminating contests (all pay auctions) are widely used as a model of situations where individuals devote resources to win some prize. In reality such contests are often preceded by investments of the contestants into their ability to fight in the contest. This paper studies a two stage game where in the first stage, players can invest to lower their bid cost in a perfectly discriminating contest, which is played in the second stage. Different assumptions on the timing of investment are studied. With simultaneous investments, equilibria in which players play a pure strategy in the investment stage are asymmetric, exhibit incomplete rent dissipation, and expected effort is reduced relative to the game without investment. There also are symmetric mixed strategy equilibria with complete rent dissipation. With sequential investment, the first mover always invests enough to deter the second mover from investing, and enjoys a first mover advantage. I also look at unobservable investments and endogenous timing of investments. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
132.
We estimated a normalized translog yield-response model using African farm-household survey data to compare the yield of smallholder maize production under integrated soil fertility management (ISFM) and chemical-based soil fertility management. Controlling for other factors, maize yield responses were higher under ISFM. Results suggest ISFM practices would significantly improve the profitability of smallholder maize production, especially under escalating fertilizer prices. 相似文献
133.
Extending previous research on celebrity endorsements, the study investigates whether the meaning of celebrities is transferred to endorsed brands and how transfer effects develop over time. Additionally, the moderating roles of brand experience, celebrity liking, and consumers’ age are investigated. The hypothesized effects are modeled using a propositional learning approach with an experimental repeated-measures design (panel data). Results confirm the assumed meaning transfer effect. In addition, the effects appear to be substantially stronger after about a week indicating some type of sleeper effect. Furthermore, the effects increase with increasing brand experience and celebrity liking. Adolescent consumers are not differently affected when compared to adults and controlled for the differing levels of brand experience. Results are discussed in light of propositional learning theory. Future areas of research are proposed. 相似文献
134.
abstract It is crucial from an employee's point of view to perceive some degree of stability even in times of major organizational change. This paper examines the role of a sense of continuity for organizational identification after an organizational merger. We argue that mergers and acquisitions so often end in failures partly because the change is designed in discontinuous ways and employees do not feel they are doing the same job after the merger as before. Such discontinuous change engenders a critical tension between positive and negative effects of identification that has not yet been fully understood. To deepen the understanding of this tension, in‐depth interviews were conducted in a recently merged German industrial company. Based on these qualitative data we demonstrate how features of the post‐merger company structure and the way it was implemented may have eroded organizational identification. Finally, we propose a parsimonious model to be tested by future research, in which the sense of continuity is consisting of both observable as well as projected continuity. 相似文献
135.
The Impact of Jumps in Volatility and Returns 总被引:17,自引:0,他引:17
This paper examines continuous‐time stochastic volatility models incorporating jumps in returns and volatility. We develop a likelihood‐based estimation strategy and provide estimates of parameters, spot volatility, jump times, and jump sizes using S&P 500 and Nasdaq 100 index returns. Estimates of jump times, jump sizes, and volatility are particularly useful for identifying the effects of these factors during periods of market stress, such as those in 1987, 1997, and 1998. Using formal and informal diagnostics, we find strong evidence for jumps in volatility and jumps in returns. Finally, we study how these factors and estimation risk impact option pricing. 相似文献
136.
Johannes Jger 《International journal of urban and regional research》2003,27(2):233-249
Whilst real estate capital became a driving force in analyses of urban development, urban land rent theory has made only very limited progress during the past decade. There are a number of reasons for this – such as a weak conceptualization of the role of political agency, for example. Hence, a way out of this relative stagnation, by attempting to systematically develop an integrated view on structure and agency in the context of urban land rent, is offered in this article. Advances in critical theory, thinking about space and dialectic reasoning contribute to the development of a new perspective on land rent. Land rent is conceptualized as a middle‐range theory. In order to bring together concrete urban phenomena with the general process of political‐economic development, a systematic link between land rent theory and the theoretical apparatus of the French Regulation School is developed. The reformulation of land rent theory from a regulationist perspective underlines the importance of the institutional context (and its changes) for an understanding of rent and its role in the urban context. In so doing, land rent theory proves to be a very useful tool for providing an integrated political‐economic perspective for analyses of urban phenomena. This is illustrated briefly in the cases of Vienna and Montevideo. Si le capital immobilier est devenu un point central des analyses du développement urbain, la théorie n'a guère progressé au cours de la dernière décennie. Plusieurs facteurs sont en cause, telle la faible conceptualisation du rôle politique d'agence. Cet article propose donc une porte de sortie à cette relative stagnation, en tentant de construire systématiquement une vision intégrée de la structure et l'agence dans le cadre de la rente urbaine. Les progrès en matière de théorie critique, réflexion en termes d'espace et raisonnement dialectique facilitent l'élaboration d'une nouvelle perspective sur la location foncière, laquelle est conceptualisée en tant que théorie intermédiaire. Afin de regrouper phénomènes urbains concrets et processus général d'aménagement politico‐économique, une relation systématique est établie entre la théorie sur la rente foncière et l'appareil théorique de l'École Française de Régulation. Reformuler la théorie sur la rente foncière d'un point de vue régulationiste souligne combien le contexte institutionnel (et ses changements) est important pour comprendre la rente et son rôle dans le cadre urbain. Ce faisant, la théorie sur la rente foncière se révèle un outil très utile pour créer une perspective politico‐économique intégrée permettant d'analyser les phénomènes urbains. Cet aspect est brièvement illustré dans les cas de Vienne et Montevideo. 相似文献
137.
Johannes Van Biesebroeck 《Journal of Productivity Analysis》2009,32(2):63-79
International comparisons of productivity have used exchange rates or purchasing power parity (PPP) to make output comparable
across countries. While aggregate PPP holds well in the long run, sectoral deviations are persistent. It raises the need for
a currency conversion factor at the same level of aggregation as the output that is compared. Mapping prices from household
expenditure surveys into the industrial classification of sectors and adjusting for taxes and international trade, I obtain
an expenditure-based sector-specific PPP. Using detailed price data for up to 8 years between 1970 and 1999, I test whether
the sectoral PPPs adequately capture differential changes in relative prices between countries. They work well for agriculture
and the majority of industrial sectors, but not for most service sectors and for manufacturing sectors that produce differentiated
products. Using the most appropriate conversion factor for each industry, productivity convergence is found to be taking place
in all but a few industries for a group of 14 OECD countries. The latter results are robust to the base year used for the
currency conversion. 相似文献
138.
Recognition is a basic precondition of participation. This article applies the dimension of recognition to business ethics. A case is made for normative stakeholder management as a voluntary commitment at the level of corporate leadership; this also meets management’s strategic demands. A vitality criterion is offered as a heuristic instrument, suggesting that any operation should be avoided which would violate the legitimate interests of stakeholders. For this reason, the recognition of mutually-conditioned stakeholder claims is understood as the central management idea. 相似文献
139.
Prof. Dr. Johannes Grabmeier 《保险科学杂志》2006,95(1):75-89
A golden rule for data modelling for data mining classification models with special considerations of problems in insurances. To create classification models to avoid contract cancellations and for cross selling purposes to be used in marketing and sales of insurance companies the necessary data modelling will be discussed. Starting from a binary classification variable — cancelled contracts and active contracts, customers of a branch and non-customers of a branch — we in particular focus on the importance of historical data: To be able to detect decision patterns for cancellations respectively for new contracts in the data with the help of data mining tools, it is necessary for such contracts respectively customers not to use actual data, but data as they were at the time of decision. This obvious, but rarely used principle, is presented in detail as a golden rule for correct data modelling in such situations. As a case study a project and results for nine branches in each case of the Gothaer Versicherungen is presented. 相似文献
140.
This paper explores the rebalancing of prices for voice service in the United States (US) and the European Union (EU) from conceptual and empirical perspectives. We determine the overall cost and structure of a standardized basket of residential and business services. Our data indicate that during the 1994–2000 period the degree of rate rebalancing was significantly higher in the EU than in the US. While the developments at the level of EU Member States are more heterogeneous and the process of rate rebalancing is not completed, these findings correspond to the predictions derived from our comparative institutional analysis. 相似文献