Invasive species management in a spatially heterogeneous world: Effects of uniform policies

The spread of invasive species (IS) is an inherently spatial process, and management of invasive species occurs over spatially heterogeneous regions, but policy constraints can restrict management responses to be homogeneous across regions. Using a spatial bioeconomic model that includes a representation of invasive species ecology based on heterogeneous environments that are linked across space and time by human and ecological pathways, we compare optimal spatially heterogeneous policy to spatially uniform policy. We explore the magnitude and pattern of the policy differences with emphasis on the influence of different types of underlying heterogeneity across locations.     

Schmerzen erkennen

Schmerzeinsch?tzung im Alter und bei Demenz - Menschen mit Demenz k?nnen h?ufig keine Selbstauskunft über ihr Schmerzerleben geben. Sie sind darauf angewiesen, dass die Schmerzen von anderen erkannt werden. Welche pflegerischen Instrumente erleichtern die Fremdeinsch?tzung von Schmerzen?     

Detecting Supply Chain Innovation Potential for Sustainable Development

In a world of limited resources, it could be argued that companies that aspire to be good corporate citizens need to focus on making best use of resources. User value and environmental harm are created in supply chains and it could therefore be argued that company business ethics should be extended from the company to the entire value chain from the first supplier to the last customer. Starting with a delineation of the linkages between business ethics, corporate sustainability, and the stakeholder concept, this article argues that supply chains generally have a great innovation potential for sustainable development. This potential could be highlighted with system thinking and the use of change management knowledge, promoting not only innovations within technology but also within organizational improvement. We propose process models and performance indicators as means of highlighting improvement potential and thus breaking down normative business ethics’ requirements to an opertionalizable corporate level: Good business ethics should focus on maximizing stakeholder value in relation to harm done. Our results indicate that focusing on supply chains reveals previously unknown innovation potential that seems to be related to limited system understanding. The assumption is that increased visibility of opportunities will act as a driver for change. Results also highlight the importance of focusing on sustainability effects of the core business and clearly relating value created to harm done.     

The greening of Swedish energy policy: A critique

This article discusses Swedish energy policy over the period 1973–1992 with a focus on its current energy objectives. Bans on energy sources are assessed as one of the challenges faced by Sweden in the 1990s. We raise questions about the future consequences of such draconian approaches to energy policy that inhibit societal learning. Bans on any fuel source only serve to handicap the economy and lead to a less flexible and more inefficient energy supply at a greater than necessary cost. With the Swedish economy on the verge of becoming more integrated with the rest of Europe, it is imperative to view its comparative advantage in electricity as the basis for its energy policy rather than the individual fuels that generate that electricity. Our goal has been to synthesize components among existing energy objectives to suggest logical implications for the future.     

The Tax Consequences of Long‐Run Pension Policy*

A firm's pension fund is legally separate from the firm. But because pension benefits are normally independent of fund performance, pension assets impact the firm very much as if they were firm assets. Because they are worth more when times are good and less when times are bad, common stocks in the pension fund add to the sponsoring firm's leverage. They cause contributions to a pension fund to be high just when the firm can least afford to pay them. Conversely, bonds in the pension fund will make it easier for the firm to avoid default on its own bonds when times are bad all over: The more bonds a pension fund buys, the more the firm can borrow. The tax treatment accorded the pension fund differs notably from that accorded the firm. Some have argued that a firm can capitalize on the difference by accelerating the funding of its pension plan. The benefits of full funding are wasted, however, unless the added contributions to the fund are invested in bonds; higher pension contributions now mean lower contributions later, hence higher taxes later. The benefits come from earning, after taxes, the pretax interest rate on the bonds in the pension fund. If the firm wants to take advantage of the differing tax treatment of bonds without altering the level of its current pension contributions, it can (1) sell stocks in the pension fund and then buy bonds with the proceeds while (2) issuing debt in the firm and buying back its own shares with the proceeds. An investment in the firm's own stock creates no more tax liability than an investment in stocks through the pension fund.     

How Large are the Welfare Gains from Technological Innovation Induced by Environmental Policies?

This paper examines whether the welfare gains from technological innovation that reduces future abatement costs are larger or smaller than the Pigouvian welfare gains from optimal pollution control. The relative welfare gains from innovation depend on three key factors—the initially optimal level of abatement, the speed at which innovation reduces future abatement costs, and the discount rate. We calculate the welfare gains from innovation under a variety of different scenarios. Mostly they are less than the Pigouvian welfare gains. To be greater, innovation must reduce abatement costs substantially and quickly and the initially optimal abatement level must be fairly modest.     

Smallholder Farmers and Collective Action: What Determines the Intensity of Participation?

Collective action through farmer groups can be an important strategy for smallholders to remain competitive in rapidly changing markets. Previous research has analysed determinants of farmer participation in groups, equating participation with group membership. However, within groups the commitment of members can vary, as marginal benefits and costs are not the same for all individuals, and opportunities to free‐ride exist. Low participation in collective activities may reduce the ability of groups to provide useful services to its members. This article investigates determinants of member participation intensity, using the example of farmer groups in Kenya. The role of individual and group characteristics is analysed with survey data and regression models. Previous benefits that members received through the group positively influence their intensity of participation in group meetings and collective marketing, suggesting that reciprocity motives play a role. Low participation can mostly be attributed to structural and institutional conditions, such as group size and the timing of payments for collective product sales. More diversified farmers are less likely to sell collectively when group marketing activities only concentrate on one particular commodity. Since smallholders are often highly diversified, the focus of farmer groups should also be broadened. Further policy implications are discussed.