Die Zukunft der Kommunikationsberufe

Ohne Zusammenfassung     

Guidelines for choosing between multi-item and single-item scales for construct measurement: a predictive validity perspective

Establishing predictive validity of measures is a major concern in marketing research. This paper investigates the conditions favoring the use of single items versus multi-item scales in terms of predictive validity. A series of complementary studies reveals that the predictive validity of single items varies considerably across different (concrete) constructs and stimuli objects. In an attempt to explain the observed instability, a comprehensive simulation study is conducted aimed at identifying the influence of different factors on the predictive validity of single versus multi-item measures. These include the average inter-item correlations in the predictor and criterion constructs, the number of items measuring these constructs, as well as the correlation patterns of multiple and single items between the predictor and criterion constructs. The simulation results show that, under most conditions typically encountered in practical applications, multi-item scales clearly outperform single items in terms of predictive validity. Only under very specific conditions do single items perform equally well as multi-item scales. Therefore, the use of single-item measures in empirical research should be approached with caution, and the use of such measures should be limited to special circumstances.     

Shareholder Value: Principles, Declarations, and Actions

This paper is about shareholder value. We examine whether welfare considerations justify that target and whether competitive markets force firms to pursue it. We also argue that shareholder value is strictly an ill-defined goal. We report evidence from a large sample of listed firms across the world that many managers do not even mention shareholders in their mission statements. However, firms that do disclose a commitment to shareholders seem to perform better in terms of stock price and operating performance.     

Management Changes,Reputation, and “Big Bath”—Earnings Management

We study the effects of managerial turnover on earnings management activities in a model in which managers care about their external reputation. We develop an overlapping generations model showing that both outgoing and incoming managers bias reported earnings such that typically very low returns are reported in the first period after a manager has been replaced. Outgoing managers shift earnings forward to their last period in office as they will not benefit from earnings realized after that. Incoming managers can have an incentive to shift earnings to the second period in office as reported earnings will, immediately after a management change, only be partly attributed to their own ability. Deferred compensation can reduce incentives for earnings management.     

Plays nice with others? Multiple ecosystems,various roles and divergent engagement models

In strategic management, the term meta-organisation is discussed as a network of firms and individuals in which members coexist, collaborate and evolve through a set of relationships and together form a larger organism. We focus on the meta-organisation form of an ecosystem in the IT industry, which often is based around a technical architecture or platform. Studies often discuss one network and selected members in such a network, but few mention that firms can work in multiple ecosystems and need to apply divergent engagement models. We study how firms engage in multiple ecosystems through three qualitative case studies. The article contributes with the following: (1) firms often operate in multiple ecosystems for which they need to dynamically adapt their engagement strategy. (2) Firms are striving to balance between strategic divergences: power versus symbiosis and a collaborative approach versus a competitive approach.     

Policy Instruments for Groundwater Management in the Netherlands

In the Netherlands agriculture andnature have conflicting interests with respectto groundwater management. Insight into thesuitability of policy instruments to achieveoptimal groundwater level and extractionmanagement in the Netherlands is, however,missing. In this paper the suitability ofpolicy instruments for groundwater managementis studied. Changes in the institutionalenvironment and voluntary agreements seem to bemore suitable for groundwater level managementthan economic instruments. The currenthistorical groundwater extraction rightssystems together with the low groundwaterprices encourage low-value agriculturalgroundwater usage, whereas sprinkling bans andirrigation scheduling currently aim to reducelow-value use of groundwater. These extractioninstruments are less efficient than a systemthat considers externalities in the price ofwater or diverts water away from agriculturewhile encouraging trading.     

Is the MPC's Voting Record Informative about Future UK Monetary Policy?

It is shown that the voting record of the Monetary Policy Committee of the Bank of England helps predict future policy rate changes. This result is robust to the inclusion of market participants’ expectations as measured by the slope of the term structure of money market rates and interest rate futures. Moreover, expectations seem to adjust to the information contained in the voting record, which suggests that publishing the minutes of MPC meetings increases the transparency of monetary policy.