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41.
Holger Patzelt 《Journal of Engineering and Technology Management》2010,27(3-4):131-147
We combine signalling and human capital theory to analyze how competencies of new venture CEOs impact the amount of money technology ventures acquire in venture capital (VC) financing rounds. Using data on 117 financing events in the biotechnology industry, we show that education in management, founder-based firm-specific experience, international experience, and industry-specific experience of the CEO impact the VCs’ financial commitments. Moreover, we find that the effects of management education and industry experience are moderated by the size of the venture's top management team. We discuss the implications of these findings for the research literature on technology ventures and venture capital. 相似文献
42.
43.
Johannes Hewig Ralf H. Trippe Holger Hecht Thomas Straube Wolfgang H. R. Miltner 《Journal of Nonverbal Behavior》2008,32(2):67-78
The goal of the present study was to provide first evidence for gender differences in gaze patterns while looking at the body
of men and women. For this purpose participants were exposed to 30 pictures of 15 male and 15 female models in casual clothing.
The individual scan paths were recorded using an eye-tracker. The results show that both male and female observers primarily
gaze at people’s face. Only after this initial face-scan, men look significantly earlier and longer at women’s breasts, while
women look earlier at men’s legs. These observations uncover important aspects of the pattern of the human gaze at others
and particularly reveal important gender differences. 相似文献
44.
Holger Strulik 《Mathematical Population Studies》2013,20(4):333-356
The paper analyzes an economy with an agrarian and an industrial sector. Demand is determined by Engel's Law. Population growth follows a non‐linear income dependent path according to the theory of demographic transition. In case of decreasing returns to scale in the agrarian sector the existence of a stable low‐income equilibrium with high population growth can be shown. If this equilibrium is globally unstable, the system evolves towards a steady‐state of perpetual economic growth and low population growth. The path of demographic transition coincides with a path of structural change from an economy specialized in agriculture to a fully industrialized economy. The introduction of an income dependent savings rate allows the interpretation of the low‐income equilibrium as a limit cycle and, therefore, the explanation of high fluctuations in population growth and per capita income in least developed economies. 相似文献
45.
Abstract This study compares two theoretical models that make different assumptions about the structure of subjective health constructs and about the effects of job stressors and working time variables on health. The first model, the sequence model, is based on sequential models of the development of ill-health and posits that chronic fatigue and sleep problems mediate the effects of job stressors and working time variables on depression and somatic complaints. The second model, the general strain factor model, posits that specific health constructs (e.g. fatigue, depression, and somatic complaints) are reflections of a common general strain factor (i.e. detrimental job conditions increase the individual's sensitization to strain). In this way the study expands traditional models of stress-related effects on health. The analyses were carried out in a sample of 365 individuals in Germany. Although both models fitted the data, the general strain factor model was found to be superior. Furthermore, the effects of job stressors and working time on the health constructs fatigue and sleep quality were mediated by the general strain factor. Also, a negative relationship emerged between working time duration and general strain. It is suggested that the general strain model could be useful in future health psychology research. 相似文献
46.
Matthias Söllner Axel Hoffmann Holger Hoffmann Jan Marco Leimeister 《Zeitschrift für Betriebswirtschaft》2012,82(4):109-140
Trust has been shown as a crucial factor for the adoption of new technologies. Surprisingly, trust literature offers very little guidance for systematically integrating the vast amount of behavioral trust results into the development of computing systems. The aim of this article is to develop a method for deriving trust supporting components for ubiquitous computing systems. The method is used to derive four trust supporting components for a ubiquitous restaurant recommendation system. Afterwards, the system is evaluated using a laboratory experiment with 166 undergraduate students. The results show that the users’ trust as well as their intention to use the system could be significantly increased. To the best of our knowledge, this is the first article developing and evaluating a method for systematically integrating the behavioral trust results into the development of a computing system and its value. 相似文献
47.
We consider the Bayesian D-optimal design problem for exponential growth models with one, two or three parameters. For the one-parameter model conditions on the shape of the density of the prior distribution and on the range of its support are given guaranteeing that a one-point design is also Bayesian D-optimal within the class of all designs. In the case of two parameters the best two-point designs are determined and for special prior distributions it is proved that these designs are Bayesian D-optimal. Finally, the exponential growth model with three parameters is investigated. The best three-point designs are characterized by a nonlinear equation. The global optimality of these designs cannot be proved analytically and it is demonstrated that these designs are also Bayesian D-optimal within the class of all designs if gamma-distributions are used as prior distributions. 相似文献
48.
Holger Rust 《Soziologie》2006,35(2):143-160
An excursive contentanalysis of the media suggests evidence of a strong and widespread public interest concerning sociological issues: the quest for social positioning, cultural and economic change or practical “tools” for management and marketing. But this public need for sociological explanation and consulting is only to a minot degree satisfied by professional sociologists. The majority of the media-released results are distributed by representatives of a profession named “trend-“ or “future-research”. A closer look at the work and publication-strategies of these consultants indicated that the most active protagonists like Matthias Horx not only claim to be “sociologists”, but undertake strong attacks against professional and academic sociology and social scientists. The claim to conduct authentic sociological research and using techniques of “social research” helps to legitimate the publication of the superficial results of this sociologistic research in newspapers, magazines, and media-websites. Thus for professional sociology the question arises what to fo and how to react. One strategy could repeat the practice of the so called “Third Culture” of the international science-community’s members who have started a widely renowned public discourse to meet public demands of being scientifically informed. 相似文献
49.
Many psychometric studies have investigated judgments concerning personal risks from technologies, activities or consumer products, but only a few studies have included judgments of risk to the environment. Thus, little is known about this aspect of environmental risk perception, and whether it differs from personal risk perception. This study investigates risk judgments for 30 consumer products of various types such as herbal remedies, mobile telephones, genetically engineered drugs, or garden pesticides. A survey was conducted in two German cities: Leipzig and West Berlin. In total, 408 subjects evaluated the consumer products with regard to personal and environmental risk (and other risk-related aspects) and whether they would recommend the product to others. The findings show statistically significant differences between the mean values of perceived personal risk and environmental risk for most products. Despite these differences, the rank order of mean personal risk and environmental risk judgments for the products is quite similar. However, separate analyses for each product reveal that correlations between perceived personal and environmental risk vary strongly across products. Multiple regression analyses with personal and environmental risk judgments as predictors and product recommendation as criterion, run separately for each consumer product, show that it is mainly the judgment of perceived personal risk that explains product recommendation. Perceived risk to the environment adds little explanatory power. The study also explores differences in judgments of personal and environmental risk with regard to two sociodemographic variables: location (former East Germany vs. West Germany) and gender. Differences in both types of risk judgments are found with regard to location but not for gender. 相似文献
50.
Natalie Neumeyer Holger Dette Eva-Renate Nagel 《Australian & New Zealand Journal of Statistics》2006,48(2):129-156
In this paper we investigate several tests for the hypothesis of a parametric form of the error distribution in the common linear and non‐parametric regression model, which are based on empirical processes of residuals. It is well known that tests in this context are not asymptotically distribution‐free and the parametric bootstrap is applied to deal with this problem. The performance of the resulting bootstrap test is investigated from an asymptotic point of view and by means of a simulation study. The results demonstrate that even for moderate sample sizes the parametric bootstrap provides a reliable and easy accessible solution to the problem of goodness‐of‐fit testing of assumptions regarding the error distribution in linear and non‐parametric regression models. 相似文献