Standards anwenden – Harnwegsinfekte vermeiden

Katheterassoziierte Harnwegsinfektionen - Noch vor einigen Jahren erlitten 50% der dauerkatheterisierten Patienten nach 24 Stunden und 100% nach 36 Stunden eine Infektion. Diese Rate hat sich mittlerweile deutlich verbessert, doch der Trend darf kein Ruhekissen sein. Denn circa 3,5% aller station?r behandelten Patienten in Deutschland erleiden eine nosokomiale Infektion. Spitzenreiter dabei sind Harnwegsinfektionen.     

Efficiency tests with overlapping data: an application to the currency options market

This paper presents the results of an empirical study into the efficiency of the currency options market. The methodology derives from a simple model often applied to the spot and forward markets for foreign exchange. It relates the historic volatility of the underlying asset to the implied volatility of an option on the underlying at a specified prior time and then proceeds to test obvious hypotheses about the values of the coefficients. The study uses panel regression to address the problem of overlapping data which leads to dependence between observations. It also uses volatility data directly quoted on the market in order to avoid the biases which may occur when ‘backing out’ volatility from specific option pricing models. In general, the evidence rejects the hypothesis that the currency option market is efficient. This suggests that implied volatility is not the best predictor of future exchange rate volatility and should not be used without modification: the models presented in this paper could be a way of producing revised forecasts.     

Brand Equity Management in a Multichannel,Multimedia Retail Environment

Today's multichannel, multimedia retail marketing environment presents a number of brand management challenges. From a micro perspective, marketers must manage each individual channel and communication option to maximize their direct sales and brand equity effects, as well as any indirect brand equity effects from being associated with a particular channel or communication option. From a macro perspective, marketers must design and implement channel and communication options such that sales and brand equity effects are synergistic. Concepts, frameworks, and future research directions are put forth to address these different challenges.     

Optimal Experimentation in a Changing Environment

This paper studies optimal experimentation by a monopolist who faces an unknown demand curve subject to random changes, and who maximizes profits over an infinite horizon in continuous time. We show that there are two qualitatively very different regimes, determined by the discount rate and the intensities of demand curve switching, and the dependence of the optimal policy on these parameters is discontinuous. One regime is characterized by extreme experimentation and good tracking of the prevailing demand curve, the other by moderate experimentation and poor tracking. Moreover, in the latter regime the agent eventually becomes "trapped" into taking actions in a strict subset of the feasible set.     

DRIVER RELATIONSHIPS WITH CUSTOMERS AND DRIVER TURNOVER: KEY MEDIATING VARIABLES AFFECTING DRIVER PERFORMANCE IN THE FIELD

To reduce cost and improve service, logistics managers must give attention to the critical interaction between customers and the carriers who deliver products. This research tests the premise that internal marketing with truck drivers is associated with improved relationships with customers, retention of customer‐conscious drivers, and higher driver performance.     

LOGISTICS MANAGERS' LEARNING ENVIRONMENTS AND FIRM PERFORMANCE

Dynamic changes in the business environment are significantly impacting supply chain logistics, resulting in unprecedented personnel demands. Organizational theorists suggest that personnel management is associated with better performance. However, relatively little is known about effective human resource practices within the logistics industry. The learning organization concept offers logistics organizations a theoretical rationale for promoting learning environments to better leverage employees' knowledge, skills, and abilities and improve performance. This research examines logistics managers' perceptions of individual level learning behavior within their organizations and its relationship to firm performance.     

On the efficiency of environmental instruments in a spatial economy

This paper develops an efficiency criterion to evaluate environmental policy instruments in a spatial economy. We call an environmental policy regime at the regional level efficient if it guarantees not only an efficient distribution of emission permits within a region, but also an efficient locational pattern of mobile firms across the regions of a federation. Using marketable pollution rights or emission taxes, efficiency in this broad sense can only be achieved if revenues of regional environmental agencies are not transferred to regional firms. Direct controls neither support an efficient allocation of emission rights within a region nor locational efficiency of firms.