Measuring the Implementation of Codes of Conduct. An Assessment Method Based on a Process Approach of the Responsible Organisation

More and more organisations formulate a code of conduct in order to stimulate responsible behaviour among their members. Much time and energy is usually spent fixing the content of the code but many organisations get stuck in the challenge of implementing and maintaining the code. The code then turns into nothing else than the notorious "paper in the drawer", without achieving its aims. The challenge of implementation is to utilize the dynamics which have emerged from the formulation of the code. This will support a continuous process of reflection on the central values and standards contained in the code. This paper presents an assessment method, based on the EFQM model, which intends to support this implementation process.     

The relative pricing of European dividend futures and their predictive abilities for index returns

We use dividend futures prices to derive a dividend future discount model. Arbitrage arguments postulate that the sum of discounted dividend futures prices should equal the index price, i.e. the sum of discounted dividends. We analyze whether this relation holds and find that the two valuation approaches lead to a different valuation of expected dividends. These observations indicate that dividend futures and index prices seem to provide the investor with different information on future dividends. We further show that the difference in valuation can be used to forecast index returns and show how an investment strategy can exploit this predictability.     

Gibt es eine indirekte Wirkung von Wahlumfragen?

The question of whether or not the publication of election poll results has an effect on voting behaviour has been raised since the very beginning of survey research. Various hypotheses on the direction of such effects exist, and many studies attempted to test them. However, the most we know is that we lack support for the assumption of a general influence. Rather than looking at direct effects of published poll results on voting behaviour, this paper tries to measure their indirect effects. Using a combination of trend surveys and content analysis, we investigate the effect of survey results on the coverage of the media. We can show that changes in public opinion slightly precede changes in media coverage. We interpret this finding as a possibility of an indirect effect of published poll results, which should encourage further research on this phenomenon.     

Downward wage rigidity and job mobility

Using data from the German Socio-Economic Panel (GSOEP) we study whether being individually affected by downward wage rigidity has an effect on layoffs, quits and intra-firm mobility. Within a structural empirical model we estimate the individual extent of wage rigidity. This is expressed by the wage sweep-up, which measures by how much individual wage growth increases through the effect of downward wage rigidity when compared to a counterfactual labour market with flexible wage setting. We find robust negative effects of wage sweep-up on quits and layoffs and some evidence for a positive association of wage sweep-up and promotion opportunities. This is consistent with a core-periphery view of the labour force, where a core work force is protected from layoffs and wage cuts and at the same time enjoys good promotion opportunities. On the other side a peripheral work force provides a buffer for adjustment and suffers from both flexible wages, more insecure jobs and less internal promotion opportunities.      

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.     

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.     

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.     

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.     

Fairness and the employment contract: North American regions versus Germany

Substantial evidence shows that North Americans are generallymore accepting of the market than Europeans and attribute marketoutcomes to a larger degree to effort or skill. Thus, NorthAmericans might be more accepting of layoffs and pay cuts thanGermans, and Germans might be more sensitive to the proceduresand conditions under which pay cuts and layoffs occur. The empiricalresults from our quasi-experiment are largely in line with thesehypotheses. The results may help to explain and be explainedby the different labour market institutions in the differentregions.