The industrial organization of competition in local bus services

This article is aimed at deepening our understanding of the functioning of competition in the local bus transportation industry and to evaluate its effectiveness. It provides an overview of the competitive constraints that are at work in the industry as discussed in the economic literature, and sketches empirical tests to check whether the intuitions provided by the economists are in line with the reality of the industry.Cet article vise à approfondir notre compréhension du fonctionnement de la concurrence dans l'industrie du transport urbain. Il donne un aperçu des contraintes concurrentielles qui sont à l'œuvre dans l'industrie tel que discuté dans la littérature économique, et esquisse des tests empiriques afin de vérifier si les intuitions fournies par les économistes sont en phase avec la réalité de l'industrie

Competition for versus in the market of long-distance passenger rail services

This paper is aimed at evaluating the net gains and trade-offs at stake in implementing the competition of the rail mode in the long distance passenger market either by means of franchise or by an open access mechanism. We simulate the outcomes of competition in and for the market using a differentiated-products oligopoly model allowing for inter- and intra-modal competition in a long distance passenger market. Specifically we first calibrate the model using data describing high speed lines in France and show that the incumbent railway operator’s strategy does not simply boil down to a short-term profit maximization (e.g., because of existing regulation or limit-pricing strategy). This yields two important results when simulating competition. First, whether it is for or in the market, the opening to competition does not guarantee a decrease in prices in favor of passengers. Second, the effects of opening up to competition for the market are relatively predictable and potentially positive, while those of opening up to competition in the market remain very uncertain

Competition for versus in the market of long-distance passenger rail services

This paper is aimed at evaluating the net gains and trade-offs at stake in implementing the competition of the rail mode in the long distance passenger market either by means of franchise or by an open access mechanism. We simulate the outcomes of competition in and for the market using a differentiated-products oligopoly model allowing for inter- and intra-modal competition in a long distance passenger market. Specifically we first calibrate the model using data describing high speed lines in France and show that the incumbent railway operator’s strategy does not simply boil down to a short-term profit maximization (e.g., because of existing regulation or limit-pricing strategy). This yields two important results when simulating competition. First, whether it is for or in the market, the opening to competition does not guarantee a decrease in prices in favor of passengers. Second, the effects of opening up to competition for the market are relatively predictable and potentially positive, while those of opening up to competition in the market remain very uncertain

Cost of the mission of transport and delivery of printed press: theory and evidence

In the first part, we examine from a theoretical perspective how the cost of the mission of postal transport and delivery of newspapers should be defined and by which factors it is determined. In particular we show that a crucial ingredient in the determination of this cost is the variation in aggregate demand induced by an increase in the uniform transportation and delivery rate. In the second part, we empirically analyze the French print media market by modeling the existence of a reciprocal effect between the size of the readership and the amount of advertising. For this two-sided platform, we model the impact of the readership on the level of advertising demand and the intensity of advertising on the number of periodicals sold

Health-Promoting Properties of Common Herbs

Herbs have been used as food and for medicinal purposes for centuries. Research interest has focused on various herbs that possess hypolipidemic, antiplatelet, antitumor, or immune-stimulating properties that may be useful adjuncts in helping reduce the risk of cardiovascular disease and cancer. In different herbs, a wide variety of active phytochemicals, including the flavonoids, terpenoids, lignans, sulfides, polyphenolics, carotenoids, coumarins, saponins, plant sterols, curcumins, and phthalides have been identified. Several of these phytochemicals either inhibit nitrosation or the formation of DNA adducts or stimulate the activity of protective enzymes such as the Phase II enzyme glutathione transferase (EC 2.5.1.18). Research has centered around the biochemical activity of the Allium sp: and the Labiatae, Umbelliferae, and Zingiberaceae families, as well as flaxseed, licorice root, and green tea. Many of these herbs contain potent antioxidant compounds that provide significant protection against chronic diseases. These compounds may protect LDL cholesterol from oxidation, inhibit cyclooxygenase and lipoxygenase enzymes, inhibit lipid peroxidation, or have antiviral or antitumor activity. The volatile essential oils of commonly used culinary herbs, spices, and herbal teas inhibit mevalonate synthesis and thereby suppress cholesterol synthesis and tumor growth

Retrato físico

Conocimientos básicos de españolPaquete de actividades de español como lengua extranjera dirigido a los estudiantes franceses. En esta unidad se trabaja el vocabulario relacionado con el cuerpo humanoEnsino Médio::Língua Estrangeir