Die wirtschaftlichen Wirkungen des technischen Fortschritts

Ohne Zusammenfassung     

The use of trading strategies by fund managers: some first survey evidence

A questionnaire survey has found that most fund managers rely on the strategies of buy-&-hold, momentum and contrarian trading. These strategies are typically applied mutually. Their use is rooted in the attributes and beliefs of the respective fund managers: buy-&-hold traders are fundamentally oriented, risk averse and are less (over)confident than others. Momentum traders appear as the least risk-averse professionals, going aggressively with the trend. Contrarian traders, however, show signs of overconfidence and peculiar risk aversion, both indicating difficulties in successful strategy implementation. The behavioural patterns revealed are not easily reconciled with efficient markets.     

Absorptive capacity and firm performance: an integrative framework of benefits and downsides

Research underscores the important role a firm's absorptive capacity plays in developing knowledge, promoting open innovation, managing alliances, facilitating organisational learning, creating strategic variety, and enhancing financial performance. However, prior research often overlooks how absorptive capacity could increase a firm's costs associated with building this capacity, perpetuate and even increase inertia because of reduced variety and limited organisational search, handicap internal knowledge development, and complicate knowledge sharing. Research also ignores the growing complexity of absorptive capacity, a factor that could reduce a firm's gains from exploiting external knowledge. Our discussion builds on the knowledge-based view to provide an integrative framework for the performance effects of absorptive capacity. Based on different benefits and downsides of absorptive capacity at multiple levels of analysis, it points to an inverted U-shaped relationship between absorptive capacity and a firm's financial performance, highlighting several promising avenues for future research.     

A note on outbound open innovation and firm performance

The concept of open innovation has attracted a lot of interest over the past decade. In light of a relative emphasis on inbound open innovation (indicating an outside‐in process) in prior research, this brief note addresses the relationship between outbound open innovation (indicating an inside‐out process) and firm performance. In particular, it suggests that outbound open innovation may have positive and negative effects on firm performance based on potential benefits and risks of transferring technology. To what degree these effects materialize depends on internal factors, e.g. desorptive capacity, and external factors, e.g. appropriability. Consequently, a proficient internal management of outbound open innovation is critical to avoid its potential risks and to capture its substantial benefits. In this regard, future research may substantially deepen the insights into the relevance and role of outbound open innovation.     

Linear cumulative prospect theory with applications to portfolio selection and insurance demand

Abstract The present paper combines loss attitudes and linear utility by providing an axiomatic analysis of corresponding preferences in a cumulative prospect theory (CPT) framework. In a sense we derive a two-sided variant of Yaari’s dual theory, i.e., nonlinear probability weights in the presence of linear utility. The first important difference is that utility may have a kink at the status quo, which allows for the exhibition of loss aversion. Also, we may have different probability weighting functions for gains than for losses. We apply the model to both portfolio selection and insurance demand. Our results show that CPT with linear utility has more realistic implications than the dual theory since it implies only a weakened variant of plunging. Mathematics Subject Classification (2000): 91B08, 91B28, 91B30 Journal of Economic Literature Classification: D81, G11, G22     

From Partners to Players: Extending the HR Playing Field

HR professionals must always be “becoming” or constantly changing and adapting. For the last decade, many have argued the business partner role as a complement to traditional HR administrative work. We argue in this paper that HR professionals should move beyond partners to become players. HR professionals as players are “in the game, on the field, making a difference” through their HR work. In this article, we suggest that to become players, HR professionals must learn to coach, architect, build, facilitate, lead, and provide a conscience to business leaders. Specific knowledge and tools for each of these roles are described. © 2001 John Wiley & Sons, Inc.     

A new mandate for human resources

Should we do away with HR? In recent years, a number of people who study and write about business--along with many who run businesses--have been debating that question. The debate arises out of serious and widespread doubts about HR's contribution to organizational performance. Dave Ulrich acknowledges that HR, as it is configured today in many companies, is indeed ineffective, incompetent, and costly. But he contends that it has never been more necessary. The solution, he believes, is to create an entirely new role for the field that focuses it not on traditional HR activities, such as staffing and compensation, but on business results that enrich the company's value to customers, investors, and employees. Ulrich elaborates on four broad tasks for HR that would allow it to help deliver organizational excellence. First, HR should become a partner in strategy execution. Second, it should become an expert in the way work is organized and executed. Third, it should become a champion for employees. And fourth, it should become an agent of continual change. Fulfilling this agenda would mean that every one of HR's activities would in some concrete way help a company better serve its customers or otherwise increase shareholder value. Can HR transform itself on its own? Certainly not--in fact, the primary responsibility for transforming the role of HR, Ulrich says, belongs to the CEO and to every line manager who works with the HR staff. Competitive success is a function of organizational excellence, and senior managers must hold HR accountable for delivering it.     

Statistical study of foreign exchange rates, empirical evidence of a price change scaling law, and intraday analysis

In this paper we present a statistical analysis of four foreign exchange spot rates against the U.S. Dollar with several million intra-day prices over 3 years. The analysis also includes gold prices and samples of daily foreign exchange prices over 15 years. The mean absolute changes of logarithmic prices are found to follow a scaling law against the time interval on which they are measured. This empirical law holds although the distributions of the price changes strongly differ for different interval sizes.Systematic variations of the volatility are found even during business hours by an intra-day analysis of price changes. Seasonal heteroskedasticity is observed with a period of one day as well as one week as the result of an analogous intra-week analysis; taking this into account is necessary for any future study of intra-day price change distributions and their generating process. The same type of analysis is also made for the bid-ask spreads.