Armutsmessungen im Zeitverlauf

Die Armut ist in Deutschland zu einem wachsenden Problem geworden. Trotz der aktuellen Konjunktur auf dem Arbeitsmarkt ist damit zu rechnen, dass der 2008 erscheinende dritte Armuts- und Reichtumsbericht der Bundesregierung für 2006 eine Rekordzahl für die Armutsentwicklung meldet. Wie l?sst sich Armut am aussagef?higsten messen? Welche Indikatoren beschreiben neben dem Einkommen die Lebensbedingungen? Dr. Olaf Groh-Samberg, 35, und Dr. Jan Goebel, 36, sind Mitarbeiter in der Abteilung L?ngsschnittstudie Sozio-oekonomisches Panel (SOEP) beim DIW in Berlin.     

How to hedge if the payment date is uncertain?

This paper investigates how firms should hedge price risk when payment dates are uncertain. We derive variance-minimizing strategies and show that the instrument choice is essential for this problem, similar to the choice between a strip and a stack hedge. The first setting concentrates on futures hedges, whereas the second allows for nonlinear derivatives. In both settings, firms should take positions in derivatives with different maturities simultaneously. We present an empirical analysis for commodities and exchange rates, showing that in both settings the optimal strategy clearly outperforms the commonly used heuristic strategies which consider only one hedging instrument at a time.     

Conceptualizing businesses as social actors: A framework for understanding sustainability actions in small‐ and medium‐sized enterprises

Small‐ and medium‐sized enterprises (SMEs) can play a crucial role in advancing environmental and social well‐being. Yet various—often conflicting—explanations have been offered to clarify why SMEs pursue sustainability. Some arguments foreground possibilities of profit maximization, whereas others emphasize individual values and convictions. Research supporting such contradicting explanations is often biased towards large enterprises or small, innovative frontrunners. In this article, we examine the underlying drivers of social and environmental interventions of SMEs by exploring empirical data from a survey of over 1,600 Canadian SMEs and complementary in‐depth interviews. We argue that sustainability actions of SMEs can be understood by viewing these firms as social actors—organizations that are shaped by individual values, internal and external interpersonal relationships, and are embedded in a social environment. This conceptualization directs attention to the full range of factors that shape sustainability engagement of SMEs and highlights frequently overlooked forms of sustainability‐oriented actions.     

Measuring Farm and Market Level Economic Impacts of Improved Maize Production Technologies in Ethiopia: Evidence from Panel Data

While it is often recognised that agricultural technology adoption decisions are intertwined and best characterised by multivariate models, typical approaches to examining adoption and impacts of agricultural technology have focused on single technology adoption choice and ignored interdependence among technologies. We examine farm‐ and market‐level impacts of multiple technology adoption choices using comprehensive household survey data collected in 2010/11 and 2012/13 in Ethiopia. Economic surplus analysis combined with panel data switching endogenous regression models are used to compute the supply shift parameter (K‐shift parameter), while at the same time controlling for the endogeneity inherent in agricultural technology adoption among farmers. We find that our improved technology set choices have significant impacts on farm‐level maize yield and maize production costs, where the greatest effect appears to be generated when various technologies are combined. The change in maize yield and production costs results in an average 26.4% cost reduction per kilogram of maize output (the K‐shift parameter). This increases the producer and consumer surpluses by US$ 140 and US$ 105 million per annum, respectively. These changes in economic surplus help to reduce the number of poor people by an estimated 788 thousand per year. We conclude that deliberate extension efforts and other policies that encourage integration of technologies are important for maize technologies to yield their full potential at both farm and market levels.     

Resource saving and productivity enhancing impacts of crop management innovation packages in Ethiopia

Crop management innovations are often not discrete fixed stand‐alone options—and their adoption may imply various combinations and adaptations. This potentially confounds their impact assessment. This article assesses the resource saving and productivity enhancing impacts of a crop management package revolving around minimum tillage in maize‐based farming systems in northwest Ethiopia. An endogenous switching regression model was applied to plot‐ and household‐level survey data collected from 290 rural households operating 590 maize plots during the 2012 production year. Controlling for variations in plot and household characteristics, the average effect of minimum tillage package (minimum tillage package) on maize productivity is 0.44 t/ha. Compared to conventional practice (CP), adoption of the MTP decreased the average male and female labor use in maize production by 14.4 and 8.2 person‐days per ha, respectively. Similarly, MTP adoption decreased draft power use for land preparation by 13.2 pair of oxen‐days per ha. Compared to CP, in general, there is a considerable short‐run maize productivity gain and reduction in labor and draft power use under MTP.     

Strategische Kommunikationsspiele

The main question of this paper is how actors in strategic communication constellations deal with seemingly hopeless situations. The thesis presented here is that actors in such situations make a strategic communication play. Basically, this facilitates the continuation of communication. The concept of strategic communication plays is developed theoretically in this paper. It is shown that strategic communication plays come across in direct interpersonal communication as well as in mass medial mediated communication. In the communication-sociological approach, it is used as the theoretical basis of a difference theory and paradoxical term of play based on Bateson (1956, 1985), embedded in the frame analysis of Goffmann (1980). On this basis, two functions of strategic communication plays are worked out. On the one hand, it is an extension of freedom of action and on the other hand increases the probability of sympathy and credibility attributions through self-thematization.     

Charts and demand: Empirical generalizations on social influence

Social influence on consumer behavior has long been a subject of academic research in various scientific fields. According to research by Salganik, Dodds, and Watts (2006), music demand is a function of social influence between consumers. Market concentration tends to increase when information on demand becomes publicly available. In addition, stochastic agglomeration caused by social influence decreases the predictability of market success. These heavily cited findings challenge traditional market research and provide important insights on the impact of social media and sales charts. We test the stability of their results by replicating the study on music demand in a slightly different setting. We further investigate the generalizability of findings by probing other product categories and different phases of purchase decisions, i.e., interest, consideration, and actual demand. Across all categories and across all dependent variables, we are able to replicate the direction of the effects. We do, however, consistently obtain smaller effect sizes than reported in the original paper.     

Publizistische Chancengleichheit in der Wahlkampfberichterstattung?

A true democracy is based on political competition. Political parties set up programmes and suggest solutions which the electorate is then asked to choose between. Competition for tomorrow??s leadership positions can only be fair if today there are equal opportunities for all parties. The German legislative body passed several laws which are meant to guarantee equal opportunities in this contest. In times of an ever increasing importance of the mass media for political communication, this paper is meant to answer the question of whether??besides equal political opportunities??there is something like equal media opportunities, and if so, which indicators can be used to measure them. After a broad theoretical examination, an empirical analysis of the media coverage prior to the general elections in 1998, 2002 and 2009 follows. It reveals that??from a quantitative point of view??there certainly are equal media opportunities for the political parties sitting in the German Bundestag. The chances for media coverage are, especially for smaller parties, better than the gradation of equal chances by formal regulations.     

Incorporating sustainability criteria into credit risk management

Does a commercial debtor's economic, environmental and social performance in terms of sustainability affect its credit risk rating? Does adding criteria aimed at assessing a lender's environmental, social or sustainability practices provide added value to traditional financial rating criteria? Many analyses have reported that a correlation exists between companies' environmental and their financial performance. We checked out the assertion that it ‘pays to be sustainable’ by analyzing the role that criteria pertaining to sustainability and environmental orientation play in the commercial credit risk management process. Our results show that sustainability criteria can be used to predict the financial performance of a debtor and improve the predictive validity of the credit rating process. We conclude that the sustainability a firm demonstrates influences its creditworthiness as part of its financial performance. Copyright © 2008 John Wiley & Sons, Ltd and ERP Environment.