Transfer of risk in the newsvendor model with discrete demand

In this paper we consider the transfer of risk in a newsvendor model with discrete demand. We view the newsvendor model as a leader/follower problem where the manufacturer (leader) decides the wholesale price and the retailer (follower) decides the quantity ordered. Taking a Pareto-optimal contract as a starting point, the manufacturer wishes to design a real option contract to enhance profits. A new real option contract is said to be feasible if both parties' expected profit is at least as great as in the original contract. When demand is discrete, there are usually infinite feasible contracts that yield maximum expected profits to the manufacturer. In the paper we show that either all, some or none of these real option contracts offer an improved position for the retailer.     

Labeling of nanotechnology consumer products can influence risk and benefit perceptions

Currently, there is no mandatory labeling for products containing synthetic nanoparticles. The public as well as other stakeholders have positive views about mandatory labeling. However, little is known how such a label influences the risk and benefit perception of a product. Consumers may infer that a label is a signal that there are risks associated with this technology. Data were collected in a survey experiment (N= 1,382). Participants were randomly assigned to one of six conditions. The control group received a picture of a sunscreen container without a label. One experimental group received a picture of a sunscreen container with a label. The other groups received, in addition to the sunscreen container with a label, some risk or benefit information. Results suggest that labeling of products may reduce consumers' benefit perception and increase risk perception. Labeling nanotechnology consumer products may change the public perception of the products. Respondents may have relied on the affect heuristic for assessing the risks and benefits of the sunscreen.     

A 14-h night-shift in the control room of a fire brigade

Abstract

All 29 operators in the control room of a fire brigade performed test sessions during work and leisure time at 2-h intervals on a day with a 14-h night-shift, a day off and a day with a 10-h morning shift. The test sessions consisted of a visual search choice reaction time test and two Sternberg memory search tests (1 or 5 letters had to be memorized). Furthermore, the operators recorded their oral temperature and their subjective alertness before each test session. The subject also kept a diary of work and sleep times for 14 days. The circadian rhythm of body temperature was hardly changed by a single night-shift. Parallel to the body temperature, the subjective alertness fell significantly during the night-shift reaching a minimum value at 06:00 h. The mean reaction times increased non-significantly at the end of the night-shift and the results of the two Sternberg memory search tests showed no significant trends. The sleep of the operators after the night-shift was on average reduced to 5 hs 34 min. The results of subjective rating of alertness and reaction time test are interpreted as effects of the combined influences of circadian rhythmicity, sleep loss and time on professional task. Most results support the conclusion that a 14-h night-shift without extensive breaks is not acceptable.     

Skizzen zur Frage der Identität

Traditional forms of personal identity are tending to disappear or dissolve. The current development does not allow us to conceive identity with a specific content This process is often considered destructive for personality. I suggest, seeing it as a chance to stop glorifying identity and to approach the concept and reality of the ?Empty Self“.     

Mixed contracts for the newsvendor problem with real options and discrete demand

In this paper we consider the newsvendor model with real options under discrete demand. We consider a mixed contract where the retailer can order a combination of q units subject to the conditions in a classical newsvendor contract and Q real options on the same items. We provide a closed form solution to this mixed contract when the demand is discrete and study some of its properties. In particular we demonstrate that a mixed contract may be superior to a real option contract when a manufacturer has a bound on how much variance she is willing to accept.     

Please wait until I am done! Longitudinal effects of work interruptions on employee well-being

ABSTRACT

Work interruptions are contemporary job stressors that occur frequently in the workplace. Theories on work interruptions and the stressor–strain relationship over time suggest that work interruptions should have a lagged negative effect on well-being. However, we argue that continued changes in work interruptions may also be important for employees’ well-being. We investigated the mid- and long-term effects of work interruptions on employee job satisfaction and psychosomatic complaints across two studies (Study 1: N?=?415, four waves over five years; Study 2: N?=?663, five waves over eight months). Using latent growth modelling, we predicted job satisfaction and psychosomatic complaints with respect to the level of, and changes in, interruptions. Controlling for initial well-being, we found that the mean levels (intercepts) of work interruptions had negative effects on later well-being in Study 1, but not in Study 2. However, increases in interruptions over time (slopes) predicted later well-being consistently. An analysis on reversed effects revealed that only the initial level of psychosomatic complaints positively predicted work interruptions. The studies underscore not only the importance of interruptions for well-being over time in general, but also the particular importance of exposure to increases in interruptions.     

On the malfunction of the generic approach in small voluntary associations

Management and marketing techniques that are of great value in private firms may not prove as important in voluntary and nonprofit organizations. The author highlights problems in the direct application of the so-called generic approach to third sector organizations by examining small voluntary organizations in the Danish sports sector. He argues, first, that it may be unnecessary to apply generic management techniques; second, that it may be dysfunctional with regard to leadership and management; and, third, that the consequences of the chosen (generic) strategies may be detrimental to the function and image of the associations. Instead, theories of organization, strategic management, and marketing should recognize the special mix of competing, complementary, and overlapping values, rationales, and evaluation criteria that characterize small voluntary organizations.     

On the landscape of the relation between Hannah Arendt and Martin Heidegger

Since Elisabeth Young-Bruehl first revealed it in Hannah Arendt: For Love of the World, 1982, admirers of Hannah Arendt have been troubled by the fact that she was for four years—from 1924 to 1928—the mistress of Martin Heidegger. She was a Jew who fled Germany in August 1933, a few months after Hitler’s assumption of power. He was elected Rector of the University of Freiburg in the spring of 1933, and in a notorious inaugural address hailed the presence of the brown-shirted stormtroopers in his audience, claimed that Hitler would restore the German people to spiritual health, and ended by giving the familiar stiff-armed Nazi salute to cries of “Sieg Heil.” The thought that these two were ever soulmates is hard to swallow. I I am deeply indebted to Guenther Roth and Egon Bittner for important suggestion, which I used to improve an earlier draft of this article. I am grateful for help of many different kinds to Zygmunt Bauman, Inge Castellini, Teresa Gilman, Alison Grossman, Ellen B. Hill, Irving Louis Horowitz, Jonathan B. Imber, Denah Lida, Hans Mohr, Asja Petrović, David Riesman, and Harry Zohn.