Commodity taxes and welfare under endogenous market conduct

We consider consumption taxes in a model of endogenous Cournot versus Bertrand competition. It is argued that when the choice of unit versus ad valorem taxes affects longer-term decisions beyond the customary price or quantity decisions, the mix of the two taxes co-determines market conduct. This gives ad valorem taxes an anti-competitive effect that harms ad valorem taxes’ efficiency in comparison with unit taxes. We show that a mix of the taxes—or a unit tax alone if we compare one or the other of the taxes—is sometimes welfare superior on account of consumer-price and tax revenue effects. A practical implication of our findings is that pass-through rates are only sometimes useful guides for policy. In fact, we show when the proper response to demand for higher revenue is a higher unit tax rate and a lower ad valorem tax rate.     

Experiences of the development and use of scenarios for evaluating Swedish national environmental objectives

The aim of the present paper is to present and evaluate a method for encouraging long-term thinking and considerations of a variety of scenarios in environmental policy processes. The Swedish environmental policy is based on 16 environmental objectives that national authorities are responsible for. They are evaluated annually and also in-depth every fourth year. Here we describe and explore a futures study project for introducing a more long-term thinking in the work with the environmental objectives, tested in the in-depth evaluation 2008. An experience was that it is difficult to design a collective scenario work in a case with a wide variety of objectives and with individuals with different backgrounds. However, this difficulty makes it even more important to incorporate futures studies in authorities work. Scenario work is often subcontracted, leading to a constant lack of futures studies competence and thinking at the authorities. Another experience is that despite the difficulties, experts at the authorities did start thinking more in terms of opportunities with futures studies. A general conclusion from the work was that there is an interest and need for futures studies at the authorities in charge of the environmental objectives. The possibly most important conclusion from this project was that the authorities need to build up their own competences in futures studies.     

Regulating a Polluting Firm Under Asymmetric Information

This paper reinterprets the Laffont-Tirole model of regulation under asymmetric information to cover the case of pollution control. The asymmetry of information concerns the firm's cost of lowering its pollution. The regulator has three objectives: Ensuring an efficient abatement level, generating 'green taxes' and securing the survival of the firm. We show that when optimal abatement is important relative to tax generation, the regulator cannot use the policy of offering the firm a set of linear tax schemes from which to choose. By contrast, this policy is optimal in the Laffont-Tirole model under certain not very restrictive assumptions. We proceed to establish a simple rule for when to shut-down inefficient types. In an example with specific functional forms, we derive the optimal tax function both analytically and graphically. We show the effect on the optimal tax system of a change in a technological parameter.     

Rules,discretion, and international monetary and fiscal policy coordination

This paper considers the implications of international policy coordination when both monetary and fiscal policy choices are endogenous. We show that a movement from insular monetary commitment to international monetary policy coordination will, if fiscal policies are not coordinated, produce higher output and public expenditure levels at the expense of higher inflation rates. We also show that the concurrent coordination of monetary and fiscal policies raises output and inflation while lowering public expenditure relative to a regime of monetary coordination alone. We conclude that the arguments for concurrent monetary and fiscal policy coordination fail to have a clear-cut theoretical basis.     

The Rise in Danish Unemployment: Reallocation or Mismatch?*

The two main competing theories for the outward shift in the uv‐curve are investigated: increased separations from employment at a given employment level (reallocation) and decreased levels of hires, given unemployment and vacancies (mismatch). Shifts in the unemployment–vacancy (uv)‐curve and the hiring function are modelled by smooth transition functions, and the hypothesis of analogous shifts in the two curves is tested and accepted. This is interpreted as evidence in favour of the mismatch hypotheses.     

The effectiveness of personalized marketing in online banking: A comparison between search and experience offerings

This study reports the results of personalized online promotions in a context where personalization has not been researched before – in online banking. Genuine online bank customers were shown personalized banner advertisements when they logged in to their online bank account. Three financial offerings consisting of different search and experience attributes were promoted to three groups of customers. We examined the attention, elaboration and choice measures, and compared the effectiveness of personalized banners to default banners, and the online promotions to direct-mail promotions. Despite the goal-directed routines that reflect the dominant customer behaviour in online banking, personalized banners attracted more attention than default banners. Furthermore, messages that promote fairly simple search-type offerings that are easy to apply and are linked to the context in which the promotion occurs are more effective than messages that do not fulfil these criteria. The results offer implications both for research and practice.     

The genetics of investment biases

For a long list of investment “biases,” including lack of diversification, excessive trading, and the disposition effect, we find that genetic differences explain up to 45% of the remaining variation across individual investors, after controlling for observable individual characteristics. The evidence is consistent with a view that investment biases are manifestations of innate and evolutionary ancient features of human behavior. We find that work experience with finance reduces genetic predispositions to investment biases. Finally, we find that even genetically identical investors, who grew up in the same family environment, often differ substantially in their investment behaviors due to individual-specific experiences or events.     

Unternehmenskultur und Unternehmenserfolg: Stand der empirischen Forschung und Konsequenzen für die Entwicklung eines Messkonzeptes

Im Rahmen einer übergreifenden Analyse empirischer Arbeiten wird der State-of-the-Art der Forschung zum Zusammenhang von Unternehmenskultur und Unternehmenserfolg dargelegt. Neben der inhaltlichen Analyse des Zusammenhangs liegt der Schwerpunkt des nachfolgenden Beitrags auf einem Review der Messung von Unternehmenskultur und Unternehmenserfolg, wie sie sich in den betrachteten Zusammenhangsanalysen zeigt. Aufbauend hierauf werden die Grundzüge je eines Konzeptes zur Messung der Unternehmenskultur und des Unternehmenserfolges entwickelt, welche als Ausgangsbasis verstanden werden k?nnen, um in weiterführenden Untersuchungen den Zusammenhang von Unternehmenskultur und Unternehmenserfolg für die unterschiedlichsten Unternehmen zu bestimmen.     

A note on Wick products and the fractional Black-Scholes model

In some recent papers (Elliott and van der Hoek 2003; Hu and Øksendal 2003) a fractional Black-Scholes model has been proposed as an improvement of the classical Black-Scholes model (see also Benth 2003; Biagini et al. 2002; Biagini and Øksendal 2004). Common to these fractional Black-Scholes models is that the driving Brownian motion is replaced by a fractional Brownian motion and that the Itô integral is replaced by the Wick integral, and proofs have been presented that these fractional Black-Scholes models are free of arbitrage. These results on absence of arbitrage complelety contradict a number of earlier results in the literature which prove that the fractional Black-Scholes model (and related models) will in fact admit arbitrage. The objective of the present paper is to resolve this contradiction by pointing out that the definition of the self-financing trading strategies and/or the definition of the value of a portfolio used in the above papers does not have a reasonable economic interpretation, and thus that the results in these papers are not economically meaningful. In particular we show that in the framework of Elliott and van der Hoek 2003, a naive buy-and-hold strategy does not in general qualify as self-financing. We also show that in Hu and Øksendal 2003, a portfolio consisting of a positive number of shares of a stock with a positive price may, with positive probability, have a negative value.Received: August 2004, Mathematics Subject Classification (2000): 91B28, 60H05JEL Classification: G10Support of the first author from the Jan Wallander and Tom Hedelius foundation is gratefully acknowledged. The research of the second author is supported by the Swedish Research Council.