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| Kostecki, Caroline; Rochette, S.; Girardin, R.; Blanchard, Michel; Desroy, Nicolas; Le Pape, Olivier. |
| Coastal bays provide habitats for juveniles and adults of many marine species. Mont Saint-Michel Bay (MSMB, France) hosts a highly diversified fish community and constitutes one of the most important nursery grounds for many commercially exploited marine species, such as sea bass, flatfish, clupeids and rays in the English Channel. Besides, MSMB also suffers from the massive invasion of an exotic mollusc, the American slipper-limpet (Crepidula fornicata, L). This species arrived four decades ago and now represents the main filter-feeder biomass in the bay (150 Mt), an order of magnitude larger than local farmed and natural shellfishes. Recent analyses underlined the impact of this small gastropod on the trophic structure of this bay and its negative... |
| Tipo: Text |
Palavras-chave: Spatial competition; Flatfish habitat; Crepidula fornicata; Invasive species; Mont Saint-Michel Bay. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00035/14641/11990.pdf |
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| Huck, Petra; Salhofer, Klaus; Tribl, Christoph. |
| In this paper we develop a theoretical model of competition among marketing cooperatives (co-ops) in a spatial market setting assuming uniform delivered pricing and Loschian conduct. The model is an extension to Alvarez et al.'s (2000) spatial competition model for investorowned firms (IOF). Theoretical results include i) that the prices for raw milk are, ceteris paribus, higher in a pure market of coops than in a pure IOF market; ii) that even coops may imperfectly transmit price changes upstream; and iii) that the price farmers receive for their raw product is a function of economic space (distance times transportation costs) between coops. We test our theoretical findings for milk processing co-ops in Northern Germany using data of monthly average... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Spatial competition; Oligopsony; Milk processing; Cooperatives; Agribusiness; L13; Q13. |
| Ano: 2006 |
URL: http://purl.umn.edu/25633 |
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| Hall, R. Lee; Dorfman, Jeffrey H.; Gunter, Lewell F.. |
| Three models of spatial competition are tested on retail price data for the agricultural chemical industry. Three empirical tests find no evidence of any spatial competition using data from sixty-five retailers and twelve different chemicals. Demand and supply-side variables have statistically significant, but economically trivial impacts on retail chemical prices. These results point to a virtually complete control of retail prices by the chemical manufacturers, likely through the rebate program they offer retailers. The oligopoly structure of the chemical manufacturing industry makes such control possible. The results suggest that consolidation of retailers or distributors will not have anti-competitive effects since price competition is essentially... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural chemicals; Market power; Spatial competition; Industrial Organization. |
| Ano: 2003 |
URL: http://purl.umn.edu/18984 |
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| Graubner, Marten; Balmann, Alfons; Sexton, Richard J.. |
| Agricultural markets often feature significant transport costs and spatially distributed production and processing which causes spatial imperfect competition. Spatial economics considers the firms’ decisions regarding location and spatial price strategy separately, usually on the demand side, and under restrictive assumptions. Therefore, alternative approaches are needed to explain, e.g., the location of new ethanol plants in the U.S. at peripheral as well as at central locations and the observation of different spatial price strategies in the market. We use an agent-based simulation model to analyze location and spatial pricing in a general model under multi-firm competition, two-dimensional space, and a continuum of potential price strategies. The... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Spatial competition; Location; Price discrimination; Oligopsony; Simulation; Industrial Organization; Research Methods/ Statistical Methods; C63; Q11; R32. |
| Ano: 2010 |
URL: http://purl.umn.edu/61225 |
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| Andersson, Hans; Hoffmann, Ruben. |
| Changes in EU agricultural policies towards an increased focus on rural development issues raise questions regarding the economic impact of local and regional spatial competition. Farmers are typically price takers in the traditional markets for the major agricultural products. This is, however, not necessarily the case for “new enterprises” active in local and regional markets. This paper examines local/regional spatial competition for farm tourism. A spatial econometrics framework is applied to a hedonic pricing model. It is shown that spatial dependence affects the pricing of both Self-catering and Bed & Breakfast. However, the results indicate that local/regional competition may have a positive effect on the former but a negative effect on the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Farm tourism; Spatial competition; Rural development; Community/Rural/Urban Development. |
| Ano: 2008 |
URL: http://purl.umn.edu/44417 |
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