In many trawl fisheries, codend size selectivity is supplemented by adding selection devices to the gear. Barents Sea gadoid fishery, combining diamond mesh codends with sorting grids compulsory. However, use of increases costs and complexity gear, causing discontent among fishermen prompting researchers seek alternative solutions. Lastridge ropes are attached selvedges codend. this study, we t...

In this paper we analyze the economic effects of implementing EPA’s newly proposed regulations for carbon dioxide (CO2) on existing U.S. coal-fired power plants using nonparametric methods on a sample of 144 electricity generating units. Moreover, we develop an approach for evaluating the economic gains from averaging emission intensities among the utilities’ generating units, compared to imple...

Despite the positive effect electricity grids separated from generation and supply by ownership are expected to have on the level of competition in the non-network activities, several EU member states still adhere to a solely legally unbundled transmission grid. This choice might be induced by regulators focusing on objectives other than the promotion of consumer interests: theoretically analyz...

We examine the use of subsidies to R&D in a mixed and a private duopoly market. We show that the socially optimal R&D subsidy is increasing in the degree of spillovers but it is lower in the private duopoly. The optimal R&D subsidy leads to an increase in total R&D and production, however, it does not lead to the equalisation of per …rm output and therefore to an e¢ cient distribution of produc...

In private values settings, the Vickrey-Clarke-Groves (VCG) mechanism leads to efficient auction outcomes, while the theoretical properties of the Simultaneous Ascending (SA) auction are not well understood. This leads us to compare the properties of an SA and a VCG auction in an experimental setting with private values for multiple objects having complementarities. Statistically, we find littl...

The phenotypes and genotypes of 22 VanA-type vancomycin-resistant enterococci that had been isolated in Japan were examined. The VanA resistance determinant was plasmid mediated in each of the 22 strains. Of the 22 strains, 8 were isolated from different patients and 11 and 3 were obtained from different samples of chickens imported from Thailand and France, respectively. Three of the strains t...

This paper shows that the presence of intermediaries’ market power in decentralized asset markets reduces volumes traded and increases price volatility. I develop a method to estimate the degree of intermediaries’ market power from trading data and I apply it to the US municipal bond market using a new dataset containing all trades executed in this market. I find a high degree of dealer market ...

We study the percentage of welfare losses (PWL) in models of horizontal and vertical differentiation. In the Hotelling model, we show that PWL depends on the underlying parameters in a non-monotonic way. We also show that PWL can be calculated from market data-locations and market size-except when the market is covered and exhibits maximal product differentiation. PWL can be very large-up to 37...

This paper discusses a model where consumers differ according to one unobservable (preference for quality) and one observable characteristic (location), with nonlinear prices arising in equilibrium. The main question addressed is whether firms should be allowed to practice different nonlinear prices at each location (delivered nonlinear pricing) or should be forced to set a unique nonlinear con...

The reproduction of two species of Cichla (Cichla cf. ocellaris and C. monoculus, commonly known in Brazil as tucunaré) introduced in the Volta Grande Reservoir, southeastern Brazil, was analyzed. The period for spawning began at the end of the dry season (September) and extended until the end of the rainy season (January). The length of the first gonad maturation (L50) and the length at which ...