Energy Informatics

Due to the increasing importance of producing and consuming energy more sustainably, Energy Informatics (EI) has evolved into a thriving research area within the CS/IS community. The article attempts to characterize this young and dynamic field of research by describing current EI research topics and methods and provides an outlook of how the field might evolve in the future. It is shown that two general research questions have received the most attention so far and are likely to dominate the EI research agenda in the coming years: How to leverage information and communication technology (ICT) to (1) improve energy efficiency, and (2) to integrate decentralized renewable energy sources into the power grid. Selected EI streams are reviewed, highlighting how the respective research questions are broken down into specific research projects and how EI researchers have made contributions based on their individual academic background.     

Das Mindestlohngesetz — Hoffnungen und Befürchtungen

The German government plans to introduce a minimum wage from 2015. This must be understood as a response to the decline in collective bargaining coverage and the marked increase in employment in the low-wage sector. The authors discuss how many workers are affected by this new regulation and whether the minimum wage is too high in relation to the average wage of workers (Kaitz index). They assume that the introduction of a minimum wage in Germany can have a number of effects. It is not possible to forecast all the reactions and behaviour of market participants to handle higher wages and goods prices. Some authors warn that these measures are significant labour market interventions that could have adverse employment effects. They recommend allowing more exemptions from the minimum wage law than intended by the government, especially for young employees and student apprentices. Other authors hope that minimum wages would help to strengthen collective bargaining and stabilise wages. Some authors emphasise that there should be a careful evaluation of the economic effects by scientists.     

Fast food,ads, and taste in a Russian child’s mind

Research demonstrates that brands can influence children’s food preferences and potentially contribute to unhealthy consumption patterns. This article extends this line of research by investigating the complex and interacting effects of food brand marketing on experienced taste. The empirical field in a remote Russian town enabled the assessment of branding effects when entering a newly established market. Examining the combination of various advertisement features with emotional brand elicitation, we derive hypotheses about the interplay of brands and advertisement components linked to the perceived taste of a fast food meal. In Novosibirsk, Russia, 778 children and adolescents aged 10–18 years were exposed to fast food advertisements with real and imaginary brand logos and varying advertising claims. The advertisements consisted of a warning, an exaggerated credence claim, or both. A subsequently offered fast food meal—a portion of French fries—was experimentally varied and prepared to be either healthier but less tasty and unsalted, or less healthy but tastier and salted. The findings verify strong and positive brand effects on children’s taste satisfaction. Warnings in advertisements “worked” only for novel fast food brands by negatively affecting taste satisfaction, but increased taste satisfaction when applied in advertisements for established brands. Single credence claims did not improve the taste experience, but counteracted the negative effects of warnings for novel brands. Finally, the established brand influenced taste satisfaction positively when the fries were saltier. The findings reveal various opportunities for fast food marketing to artificially create taste satisfaction for potentially unhealthy food. Public health strategies that focus on advertising claim restrictions should be reconsidered in the context of possible evasion strategies of the food industry and counter‐effects of warnings among strong fast food brands.     

Mean-variance hedging for continuous processes: New proofs and examples

Let be a special semimartingale of the form and denote by the mean-variance tradeoff process of . Let be the space of predictable processes for which the stochastic integral is a square-integrable semimartingale. For a given constant and a given square-integrable random variable , the mean-variance optimal hedging strategy by definition minimizes the distance in between and the space . In financial terms, provides an approximation of the contingent claim by means of a self-financing trading strategy with minimal global risk. Assuming that is bounded and continuous, we first give a simple new proof of the closedness of in and of the existence of the F?llmer-Schweizer decomposition. If moreover is continuous and satisfies an additional condition, we can describe the mean-variance optimal strategy in feedback form, and we provide several examples where it can be computed explicitly. The additional condition states that the minimal and the variance-optimal martingale measures for should coincide. We provide examples where this assumption is satisfied, but we also show that it will typically fail if is not deterministic and includes exogenous randomness which is not induced by .     

Implications of the ‘IAS Regulation’ for Research into the International Differences in Accounting Systems

Meek and Thomas (2004) call for research on the continued relevance of ‘rediscovered’ dichotomous accounting classifications. We provide such evidence by examining how developments surrounding the ‘IAS Regulation’ (1606/2002) influenced international differences in accounting systems in the European Union. Since a sufficient time series of actual post-2005 International Financial Reporting Standards (IFRS) reporting practice is not yet observable, we propose an initial re-classification of accounting systems based on evidence available to date, that is, the degree of implementation of the IAS Regulation in the Member States. Consistent with Nobes (1998), we find that the degree of public accountability to outside investors (the ‘public/private’ criterion) is becoming the primary differentiator for accounting systems in Europe, surpassing country-level variables such as legal system and culture. The distinction between consolidated and individual financial statements is the second emerging differentiator. While consolidated accounting is becoming more uniform across countries, cross-country cultural differences are most likely to persist in individual accounting. Based on our analysis we highlight two important areas of future research beyond the consolidated financial statements of listed firms (e.g. Nobes, 2005; Schipper, 2005). First, at the country level, the interaction of IFRS and individual financial statements will need to be reassessed. In addition, research could help introduce a degree of differentiation into financial reporting regulation for unlisted firms, because these firms are not a homogeneous group. Also, the convergence of national GAAP systems with IFRS will benefit from fresh research insights. Second, at the firm level, future research could analyze the extent to which the determinants and consequences of IFRS adoption, an area well researched for publicly traded firms (e.g. Cuijpers and Buijink, 2005), generalize to unlisted firms. Such research will help detect emerging patterns of accounting systems within an international context. It will generate insights into the disconnect of consolidated accounts from national influences, the degree of uniformity of consolidated accounts among international firms, the continued relevance of traditional classifications of international accounting systems for individual accounts and accounts of unlisted companies, and the convergence of national standards with IFRS.     

Reaching out: Access to and use of banking services across countries

This paper is a first attempt at measuring financial sector outreach and investigating its determinants. First, we present new indicators of banking sector outreach across 99 countries, constructed from aggregate data provided by bank regulators. Second, we show that our indicators closely predict harder-to-collect micro-level statistics of household and firm use of banking services, and are associated with measures of firm financing obstacles in the expected way. Finally, we explore the association between our outreach indicators and standard determinants of financial sector depth. We find many similarities but also some differences in the determinants of outreach and depth.     

Two Paradigms and Nobel Prizes in Economics: a Contradiction or Coexistence?

Abstract Markowitz and Sharpe won the Nobel Prize in Economics for the development of Mean‐Variance (M‐V) analysis and the Capital Asset Pricing Model (CAPM). Kahneman won the Nobel Prize in Economics for the development of Prospect Theory. In deriving the CAPM, Sharpe, Lintner and Mossin assume expected utility (EU) maximisation in the face of risk aversion. Kahneman and Tversky suggest Prospect Theory (PT) as an alternative paradigm to EU theory. They show that investors distort probabilities, make decisions based on change of wealth, exhibit loss aversion and maximise the expectation of an S‐shaped value function, which contains a risk‐seeking segment. Can these two apparently contradictory paradigms coexist? We show in this paper that although CPT (and PT) is in conflict to EUT, and violates some of the CAPM's underlying assumptions, the Security Market Line Theorem (SMLT) of the CAPM is intact in the CPT framework. Therefore, the CAPM is intact also in CPT framework.     

Fair value and audit fees

This paper investigates the effect of fair value reporting and its attributes on audit fees. We use as our primary sample the European real estate industry around mandatory IFRS adoption (under which reporting of property fair values becomes compulsory), due to its unique operating and reporting characteristics. We document lower audit fees for firms reporting property assets at fair value relative to those employing depreciated cost—a difference that appears driven, in part, by impairment tests that occur only under depreciated cost. We further find that audit fees are decreasing in firms’ exposure to fair value and increasing both in the complexity of the fair value estimation and for recognition (versus only disclosure) of fair values. We corroborate our findings in two alternative settings: contrasting UK and US real estate firms and using UK investment trusts. Overall, the results suggest that fair values can lead to lower monitoring costs; however, any reductions in audit fees will vary with salient characteristics of the fair value reporting, including the difficulty to measure and the treatment within the financial statements.