Animal rationality and implications for resource management: the case of biological reserves for moose and pine

One logical implication of the Darwinian hypothesis of ‘survival of the fittest’ is that animals exhibit optimizing behavior. Surprisingly, this has not been included in the resource economics literature. This paper explores the implications of optimizing behavior in a model where moose face migration decisions and humans wish to keep moose out of an area to protect young pine trees. The results show that if moose are rational, a given hunting effort will lead to better outcomes for humans than if the moose only focus on harvesting opportunities. This finding suggests that the validity of the standard assumption that animal migration behavior is density-dependent should be re-examined.      

On the difference between consecutive primes

Abstract

The way in which the primes are distributed among the integers have attracted the curiosity of mathematicians and even actuaries as long as the problems have been recognised. It has been shown that there are infinitely many primes, although their relative frequency among the integers in the neighbourhood of x is decreasing with increasing x. We know that there will be about y/log x primes in the interval from x to x + y for y?x. Precisely, the relative frequency of primes will be 1/log x in the neighbourhood of x. This was conjectured by Gauss, but is an established fact since 1896.     

Distributional Implications of Environmental Taxation in Denmark

Environmental taxes have been introduced in many countries. However, few countries have reached the level of environmental taxation that is seen in Denmark today. This paper analyses the individual taxes as well as the combination of all these taxes and duties related to environmental concerns, including taxes on heating, transport fuels, electricity, water, waste, plastic bags, registration of cars, annual car use and pesticides. The distributional effect of taxes is examined in relation to household income, socio‐economic class, residential location and family status. The shifting of the tax structure from high marginal income tax to consumption‐based taxes, especially environmental taxes, might have distributional impacts that have not been considered part of the tax policy. The results suggest that in Denmark taxes on petrol and registration duties for cars are progressive, whereas most other environmental taxes are regressive, especially the green taxes on water, retail containers and CO2 emissions.     

The Relative Importance of Interfirm Relationships and Knowledge Transfer for New Product Development Success*

The relationship and network literature has primarily focused on particular partner types, for example, buyer–supplier relationships or competitor interaction. This article explores the nature and relative importance of different types of interfirm relationships for new product development (NPD) success. The underlying premise of the study is that not only the type of interfirm relationships but also the combination of relationships are important for NPD performance. The interaction with a specific type of partner is expected to influence innovative performance by means of appropriate knowledge transfer. Varying needs for external knowledge, and thus types of relationships, are observed depending on the particular stages in the NPD process, the character of the knowledge base of the firm, and the industrial conditions. The absorption of external knowledge is discussed using the degree of redundancy in knowledge, which is defined as the degree of overlap in the knowledge base of the sender and the recipient of knowledge. Hence, the degree of redundancy has direct implications for the ease and, hence, use of knowledge shared with an external partner. The article is based on data from the Know for Innovation survey on innovative activities among European firms, which was carried out in 2000 in seven European countries covering five industries. The article explores the extent of use of external relationships in collaborative product development and finds that customers are involved more frequently in joint development efforts. Second, the industry association of the most important relationship is studied, and the results show that firms tend to partner with firms from their own industry. The danger in this approach is that firms from their own industry tend to contribute similar knowledge, which ultimately may endanger the creation of new knowledge and therefore more radical product developments. The analyses combine the finding that relationships with customers are used most frequently at both early and late stages of the product development process, with a second and more contradictory finding that at the same time customer relationships have a negative impact on innovative success. Moreover, the combination of customers, with both universities and competitors, has a significant negative effect on innovative performance. The potential causes of this apparent paradox can be narrowed down to two: (1) the average customer may be unable to articulate needs for advanced technology‐based products; and (2) the average customer may be unable to conceptualize ideas beyond the realm of his or her own experience. Based on this evidence the article cautions product development managers to think explicitly about what certain customers can contribute with and, more importantly, to match this contribution directly with their own sense of what direction product development should go in the future. Finally, the role of complementary as well as supplementary knowledge is investigated for innovative success finding that sharing of supplementary knowledge with external partners in NPD leads to a positive effect on innovative performance. The article is concluded by a discussion of the implication of this finding for building knowledge within the firm and for selecting external partners for NPD.     

Exploring differences between central located test and home use test in a living lab context

The concept of Living Labs (LLs) has evolved to support the creation of experience‐based development of innovations in real‐life, user‐driven and open environments. Two types of consumer product tests used generally are central location tests (CLT) and home use tests (HUT) where the acceptability or liking of a product or group of products is determined together with the view of whether one product is preferred over other products. This article explores the similarities and differences between CLT and HUT test results in a LL context. In both settings, the acceptance of five flavoured chocolate bars was evaluated for appearance, odour, taste/flavour, texture and overall liking. Apart from the mean values of liking in the two tests, data were analysed to identify consumer segments. Qualitative data were also collected by asking for consumer comments on the tested samples. The results show that independent of test method the bars were evaluated equally and all accepted by the consumers. A clear difference between CLT and HUT testing was that CLT consumers significantly differed from the HUT consumers, giving the test samples lower scores. For example, the mean values of the overall acceptance scores given by HUT consumers varied between 6.0 and 6.6, while for CLT consumers the corresponding values varied from 5.4 to 5.9. Another difference was the number of comments from consumers. CLT consumers richly commented on the products in a verbose way, while HUT consumers used the opportunity to comment very sparingly. Considering the cluster analysis as yet another difference between the testing methods, clusters from the CLT were more distinct and the number was higher with five clusters in CLT and four in HUT. Clusters where consumers liked all the products in both test settings were twice as many for HUT than in CLT. Applying the LL approach, there is a need for methods and approaches that capture a rich picture of consumers during test performance without being intrusive or obstructive of activities and context. The approach offers the opportunity for companies to have consumers not only test products but also offer input that can stimulate new innovations and give consumers more power and influence.     

Zur Analyse der Auswirkungen der Biomethaneinspeisung auf die Entwicklung der deutschen Erdgasversorgung

Natural gas offers several advantages compared to other fossil fuels, especially regarding its specific CO₂ emissions and its flexibility in usage. Thus, it is expected that the consumption of natural gas will further increase in the future. Nevertheless, this increase is accompanied by a growing dependence on imports. Biomethane, i.e. conditioned biogenous gas, is an interesting possibility for the substitution of natural gas. As it is a renewable and indigenous energy source, it contributes to the reduction of both: CO₂ emissions and gas imports. Similar to the renewable electricity generation, the German government sets targets for the biomethane feed-in and has introduced promotion mechanisms to achieve these goals. Within this paper the possible role of biomethane in the German natural gas supply has been evaluated by applying the optimising energy flow model PERSEUS-EEM. Results show that the CO₂ emissions trading system by itself is not sufficient for the competitiveness of biomethane. Model results demonstrate that a significant increase of the German natural gas demand can be expected especially due to the stringent CO₂ reduction targets. Even when the political CO₂-reduction targets are reached, biomethane will not play a major role in the natural gas supply of Germany.     

Mediating Identity: A Study of Media Influence on Organizational Identity Construction in a Celebrity Firm

This paper reports a longitudinal field study on the effects of positive media coverage on the reconstruction of organizational identity. The study highlights how intense positive coverage – to the point of turning an organization into a ‘celebrity’– influences both the way members understand their organization (sensemaking effect) and the gratification they derive from its positive representation (self‐enhancement effect). Our findings suggest that positive media representations foster members' alignment around an emergent new understanding of what their organization is. Over time, however, celebrity may ‘captivate’ members' organizational identity beliefs and understandings, and impede further identity work as media persist in the replication of representations that differ from members' experienced reality, but are too appealing to them to be publicly contradicted.     

The Evolution of Cooperation in Structured Populations

The present paper analyses the evolution of costly cooperation in a multi-group population. Building on insights first developed in modern biology the idea of viscous population equilibria is introduced (a population is said to be viscous when a (sub)population of players is spatially or genetically clustered). A simple model then analyses how the combined effect of viscosity within multiple subgroups and different levels of between-group segregation influences the evolution of cooperation. The results suggest that a key issue in the evolution of cooperation is the shifting balance between the need to protect cooperators and propagation of the tendency to cooperate.