Duration dependence testing for speculative bubbles

Prior research has employed a number of methods to test for speculative bubbles in asset prices, including a method based on the concept of duration dependence. This study explores whether duration dependence tests for speculative bubbles are sensitive to specification decisions. Our results question the efficacy of using measures of duration dependence to test for speculative bubbles. In particular, we find that evidence of duration dependence is sensitive to the method of correcting for discrete observation of continuous duration, the use of value-weighted versus equally weighted portfolios, and the use of monthly versus weekly runs of abnormal returns. (JEL C41, G12)     

Instrumental client relationship development among top-ranking service professionals

Informal client contact forms a crucial part of the daily routine of service professionals, in particular among top-ranking professionals working for consultancy and accountancy firms. In this paper, we investigate how 34 service professionals develop informal client contact, by studying their networking styles. Our study shows many similarities in informal client contact between two groups of service professionals grouped by gender, but we also found subtle differences in what we coin instrumental and expressive relations. Contrary to gender stereotypes, we found that female service professionals tended toward instrumental networking styles, using professionalism and distance and allowing the high quality of their work compensate for network deficits, contingent upon their clients’ gender. Male service professionals drew on expressive relations to develop emotional bonding with their male clients in particular, but nonetheless toward instrumental purposes. Our study contributes to service industries literature by theoretically and empirically establishing the different informal networking styles between top-ranking service professionals, and the role of emotional bonding in particular. In doing so, the paper helps to better understand the intricacies of informal client contact as a critical dimension of the professional services industry.     

Author Index

In 1998, in response to the escalating problem of violence and its impact on all sectors of the society, the Ministry of Health (MOH), Jamaica, established a pilot violence-related injury surveillance system (VRISS) in the country's leading public hospital, the Kingston Public Hospital (KPH) situated in the nation's capital. After six months' operation, VRISS was extended to include all injuries. Nine months later, the Jamaican Injury Surveillance System (JISS) was successfully introduced to four other hospitals and has been in operation since. Extension to an additional six institutions was implemented at the end of 2001. What were the challenges faced in introducing an injury surveillance system into the Accident &; Emergency Department (A&;E) of a general hospital, how they were overcome and what were the lessons learnt in the process?     

Shaping Ethical Perceptions: An Empirical Assessment of the Influence of Business Education,Culture, and Demographic Factors

Recent events at Enron, K-Mart, Adelphia, and Tyson would seem to suggest that managers are still experiencing ethical lapses. These lapses are somewhat surprising and disappointing given the heightened focus on ethical considerations within business contexts during the past decade. This study is designed, therefore, to increase our understanding of the forces that shape ethical perceptions by considering the effects of business school education as well as a number of other individual-level factors (such as intra-national culture, area of specialization within business, and gender) that may exert an influence on ethical perceptions. We found significant effects for business education, self-reported intra-national culture, area of specialization within business, and gender for some and/or all areas of ethics examined (i.e., deceit, fraud, self-interest, influence dealing, and coercion). One of our most encouraging findings is that tolerance for unethical behavior appears to decrease with formal business education. Despite the prevalent stereotype that business students are only interested in the bottom line or that business schools transform idealistic freshman into self-serving business graduates, our results suggest otherwise. Given the heightened criticism of the ethicality of contemporary managerial behavior, it is heartening to note that, even as adults, individuals can be positively affected by integration of ethics training.     

Sponsorship effects on brand image: The role of exposure and activity involvement

Sponsorships capture a significant proportion of marketing budgets. In firm evaluations of the effectiveness of sponsorship engagements, image improvements represent the most important company objective. This study develops and tests a framework for explaining how exposure and activity involvement moderate the effects of event image, event–sponsor fit, and event commercialization on sponsor image. Using empirical data collected at a large sporting event with multiple sponsors, the authors show that increased sponsorship exposure reduces sponsor image if respondents perceive a low fit between the event and sponsor or high levels of event commercialization. Involvement in the sponsored activity improves the sponsor's image, in that the effect of event commercialization is positive for highly involved persons. This paper concludes with some reasons for the findings, implications for the choice and design of sponsorships, and further areas for research.     

Nonparametric panel estimation of online auction price processes

In this study, we examine the price process of eBay online auctions. We pool sparse and unevenly spaced bidding histories of individual auctions, resulting in an unbalanced panel of bids. Since the price processes of online auctions are monotonically increasing within individual auctions and exhibit a substantial degree of heterogeneity, we propose a monotone series estimator for panel data with auction-specific slopes for a common relative price growth curve. We generalize Ramsay’s (1998, J R Stat Soc B 60(2):365–375) monotone series estimator to fit our panel model of the price process. We apply the proposed model and estimator to eBay auctions of a popular hand-held device (a Palm PDA). The results are shown to capture closely the overall pattern of observed price dynamics. In particular, the early bidding, mid-auction bidding drought, and end-auction bid sniping are well approximated by the estimated price curve.     

On the competition enhancing effects of exclusive dealing contracts

Antitrust scholars have argued that exclusive contracts have anticompetitive, or at best neutral effects, if no efficiencies are generated. In contrast, this paper shows that exclusive contracts can have procompetitive effects, provided buyers are imperfect downstream competitors and contract breach is feasible. In that case, an efficient entrant is not necessarily foreclosed through exclusive contracts but induces buyers to breach. Because breaching buyers have to pay expectation damages to the incumbent, the downstream profits they obtain when breaching must be large enough. Therefore, the entrant needs to set a lower wholesale price than absent exclusive contracts, leading to lower final consumer prices and higher welfare.     

Manufacturer collusion: Strategic implications of the channel structure

We investigate how the structure of the distribution channel affects tacit collusion between manufacturers. When selling through a common retailer, we find—in contrast to the conventional understanding of tacit collusion that firms act to maximize industry profits—that colluding manufacturers strategically induce double marginalization so that retail prices are above the monopoly level. This lowers industry profits but increases the profit share that manufacturers appropriate from the retailer. Comparing common distribution with independent (exclusive) distribution, we show that the latter facilitates collusion. Despite this result, common retailing leads to lower welfare because a common retailer monopolizes the downstream market. For the case of independent retailing, we also demonstrate that contract offers that are observable to the rival retailer are not necessarily beneficial for collusive purposes.     

Patent pools,vertical integration,and downstream competition

Patent pools are commonly used to license technologies to manufacturers. Whereas previous studies focused on manufacturers active in independent markets, we analyze pools licensing to competing manufacturers, allowing for multiple licensors and nonlinear tariffs. We find that the impact of pools on welfare depends on the industry structure: whereas they are procompetitive when no manufacturer is integrated with a licensor, the presence of vertically integrated manufacturers triggers a novel trade‐off between horizontal and vertical price coordination. Specifically, pools are anticompetitive if the share of integrated firms is large, procompetitive otherwise. We then formulate information‐free policies to screen anticompetitive pools.     

The Choice of Prices versus Quantities under Uncertainty

This paper analyzes a duopoly model with stochastic demand in which firms first commit to a strategy variable and compete afterwards. We find that in equilibrium the relative magnitude of demand uncertainty and the degree of substitutability determines firms' variable choice. Firms set prices if uncertainty is high compared to the degree of substitutability and quantities if the reverse holds true. The reason is that demand uncertainty and the degree of substitutability have countervailing effects on variable choice: Prices adapt better to uncertainty while quantities induce softer competition. If no effect dominates, firms choose different strategy variables in equilibrium.