Modelling beyond regression functions: an application of multimodal regression to speed–flow data

Summary.  For speed–flow data, which are intensively discussed in transportation science, common nonparametric regression models of the type y = m ( x )+noise turn out to be inadequate since simple functional models cannot capture the essential relationship between the predictor and response. Instead a more general setting is required, allowing for multifunctions rather than functions. The tool proposed is conditional modes estimation which, in the form of local modes, yields several branches that correspond to the local modes. A simple algorithm for computing the branches is derived. This is based on a conditional mean shift algorithm and is shown to work well in the application that is considered.     

A note on arbitrage-free asset prices with and without personal income taxes

We study the implications of the absence of arbitrage possibilities on asset pricing with and without personal income taxes. While no-arbitrage conditions in frictionless markets have sufficiently been investigated, personal income taxation is still beyond of being fully integrated into arbitrage theory. In extending the primary analysis of Ross (J Polit Econ 95:371–393, 1987) to a multiperiod framework allowing for dynamic trading strategies, we take a major step in this direction. The existence of a positive linear pricing functional is proven in a general discrete time and discrete state space model. In order to obtain the linearity of the pricing functional, one has to allow for short sales or, at most, to restrict sales to positions initially given. Hints at far-reaching economic applications are available.

Governmental Rationales for Installing Electronic Information Systems: A Quest for Responsive Social Work

Various authors have argued that electronic information systems (EIS) do not necessarily improve the responsiveness of social work. One of the main reasons given for these failings is the flawed implementation of EIS by professionals. However, we argue that the ongoing debate fails to be explicit about governmental rationales for installing EIS. This article presents the findings of a content analysis that aimed to uncover the governmental rationales for installing EIS in the Flemish child and welfare protection (CWP) system. Our analysis revealed three clusters of rationales. The first cluster supports the use of EIS as an instrument to better match supply and demand. The second cluster shows that the gathered data also serve as an instrument for accountability. A third cluster focuses on the aim of creating more uniformity. Based on our analysis, we argue that it is not flawed implementation that impedes the development of responsive social work; rather, the governmental rationales themselves are flawed.     

Quasirentenmodell und Honorare für Abschlussprüfungen in Deutschland – eine empirische Analyse

The model by DeAngelo LE (1981a) Auditor independence, ’Low Balling’, and disclosure regulation. J Acc Econ 3:113–127 suggests, that audit fees do not cover audit costs with the client´s first audit when there is perfect competition in the audit market (low balling). Further, audit fees are supposed to increase with the maturity of the relationship with the client (fee cutting). In order to test the DeAngelo model we perform a multiple regression analysis for the German market of listed clients. The results are: First year audit fees do not significantly differ from audit fees in later periods. Audit fees increase with the maturity of the relationship with the client. Additionally, audit fees are positively associated with non-audit fees and (weakly) with Big4-auditors. These findings partly support the propositions of the DeAngelo models.     

The impact of different fit dimensions on spillover effects in brand alliances

Brand alliances represent a popular business strategy in many industries, because firms hope to evoke positive consumer evaluations of both the alliance’s product and the partner brands. However, extant research offers mixed findings regarding the effects of a brand alliance on its partner brands (i.e., spillover effects). In response, this study separates spillover effects into the effects of the alliance product on the partner brands (brand alliance effects) and the effects between partner brands (brand contrast effects), while also noting the potential moderating impact of perceived attitude- and product-based fit between partner brands on resulting spillover effects. Two experimental studies consistently reveal the existence of brand contrast effects; furthermore, the partner brand’s attitude-based fit reduces undesired brand contrast effects and positively moderates spillover effects in brand alliances, whereas product-based fit does not. Therefore, a third study identifies relevant drivers of partner brand’s attitude-based fit for different brand alliances (i.e., co-branding, ingredient branding, and joint advertising). The findings have notable implications for the design and management of brand alliances.     

Household‐Level Coastal Adaptation and Its Drivers: A Systematic Case Study Review

Evidence‐based information on household‐level adaptation is an important element of integrated management of vulnerable coastal regions. A growing number of empirical studies deal with household‐level adaptation at the coast in different regions. This article provides a systematic review of these studies. We analyze studies according to how households in different parts of the world are currently adapting, or how they are intending to adapt, and identify explanatory factors for adaptation behavior and intention. We find that households implement a broad range of adaptation measures and that adaptation behavior is explained by individual factors such as socioeconomic and cognitive variables, experience, and perceived responsibilities. Nonpersonal characteristics have also been used to explain adaptation behavior and intention but have not been extensively investigated. Few studies employ qualitative research methods and use inductive approaches as well as models stemming from behavioral economics. Our findings suggest that coastal risk management policies should communicate the efficacy of household‐level adaptation, in addition to information about flood risk, in order to encourage coastal households in their adaptation activities. In this context, we discuss the role of resources and responsibility of households for their adaptation behavior. We describe the lessons learnt and formulate a research agenda on household‐level adaptation to coastal flood risk. In practice, coastal risk management policies should further promote individually driven adaptation by integrating it in adaptation strategies and processes.     

Das Erfordernis der Umsatzunabh?ngigkeit und die Konzentration auf dem deutschen Markt f��r Abschlusspr��ferleistungen

The German market for services provided by audit firms is characterised by a growing concentration over the last decades. Due to numerous scandals, an auditor is obliged to meet stricter independence regulations. An audit firm has to reject a client if it received more than 15% of its total income from the listed company to be audited at any time during the last five years and at the same time expects to receive more than 15% in the current period. It can be argued that this regulation accelerates the concentration process, while small and midsize accountants, which serve only a small number of clients, are suppressed. This analysis is based on the data of 442 Prime-Standard audits for the periods 2005, 2006 and 2007. The results show that the Big4-audit firm obtained an increasing market share in terms of clients (77% (2005), 83% (2007)) and total fees (96% (2005), 97% (2007)). Furthermore, it is noticeable, that in particular NonBig4-audit firms exceed the critical threshold of 15% during the periods under investigation. As a result hereof such firms must leave the market after five years. Hence, the German commercial code`s independence regulations may affect the audit market structure. The results suggest that an enhancement of auditor independence through income thresholds is in conflict with a reduction of market concentration. Furthermore, it can be observed that an increase in fees earned from a particular client does not impact auditor independence as long as the income threshold is not exceeded. In addition, internal auditor rotation, auditor engagement by supervisory boards, and the implementation of audit committees could also result in an increase of concentration.     

Transformational leadership climate: Performance linkages, mechanisms, and boundary conditions at the organizational level

Transformational leadership (TFL) climate describes the degree to which leaders throughout an organization engage in TFL behaviors. In this study, we investigate performance linkages, mechanisms, and boundary conditions of TFL climate at the organizational level of analysis. In a sample of 158 independent organizations, 18,094 employees provided data on TFL climate, positive affective climate, trust climate, and employees' task performance behavior and organizational citizenship behavior. In addition, human resource managers rated overall employee productivity. Study results yielded a pattern of moderated mediation for overall employee productivity and employees' aggregate task performance behavior, in that an organization's TFL climate was indirectly (through positive affective climate) related with these outcome variables under conditions of high trust climate, but not under conditions of low trust climate. Further, we found an organization's TFL climate to indirectly relate with employees' aggregate organizational citizenship behavior through positive affective climate, largely independent of the level of trust climate.     

Demand-side strategy and business models: Putting value creation for consumers center stage

Value creation for consumers, as the conditio sine qua non for value capture, is at the heart of demand-side strategy research and is a core element of almost any business model. In this paper, we discuss the unique ideas that demand-side strategy and business model research jointly contribute to the strategy literature, and we elaborate on the potential for cross-fertilization between both areas of study. We argue that both the demand-side perspective and the business model concept could jointly promote a better understanding of strategy-making by mutually relying on the distinctive insights from each stream; specifically, while research on demand-side strategy can help business model scholars gain a more robust and granular understanding of effective value propositions, business models can serve as a “bridging concept” that links the shared ideas of both areas of study to resource-based streams of strategy research.