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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estimating freight costs over a multi-modal network: an auto industry supply chain example

Moore, Amy Marie 10 April 2013 (has links)
The objective of this research is to implement multi-modal cost calculations on a freight transportation network, in order to estimate the cost of freight shipments from parts suppliers to original equipment manufacturers (OEMs), and from OEMs to final consumers involved in the automobile manufacturing industry supply chain. The research will describe gaps in the current freight cost estimation literature, determine the strengths and weaknesses of current practices, and offer possible improvement strategies. The necessary components for this research include: a multi-modal (highway-rail-water-air) network database, the geocoded locations and activity levels of auto industry parts suppliers and OEMs; freight movement cost functions; information on the modes and vehicle/vessel types used for the shipment of certain commodity types; and distance- based travel costs per-mile for these modes. A product of this line of research will be a method that other industries, in other locations, might also use to determine overall freight transportation costs throughout an entire supply chain. The present research effort provides an example using data gathered on the automobile manufacturing industry centered in Georgia and Alabama. The network-based freight costs derived in this research should also be useful in other applications, including the estimation of origin-to-destination flows, as well as in the estimation of transportation costs used in regional and statewide freight planning models.
2

Pouvoir de marché et barrières à l'entrée : le cas du marché maritime international du charbon thermique / Market power and barriers to entry : the case of the international seaborne steam coal market

Saïdi Boroujeni, Saghar 02 December 2014 (has links)
Malgré les préoccupations environnementales et climatiques, le charbon thermique reste la première source d'énergie utilisée dans la production d'électricité au monde. Face à une très forte demande mondiale, le marché maritime du charbon thermique se développe considérablement. Depuis les années 2000, ce dernier fait face à des changements structurels économiques importants. L'objectif de cette thèse est d'apporter une analyse structurelle du marché maritime du charbon thermique depuis les années 2000. À travers cette analyse, nous cherchons à expliquer l'évolution de ce marché et à déterminer les facteurs économiques et institutionnels permettant d'expliquer sa configuration. Cette thèse est constituée de trois chapitres. Dans le premier chapitre, nous définissons le marché selon les critères de produit. Nous décrivons par la suite la chaîne de valeur de l'industrie du charbon thermique afin de souligner les facteurs expliquant l'évolution de cette industrie, notamment depuis les chocs pétroliers des années 1970. Dans le deuxième chapitre, nous analysons de façon empirique la configuration du marché maritime du charbon thermique et son évolution entre 2000 et 2010. Cette analyse souligne la mesure selon laquelle les coûts du transport maritime et du fret sont susceptibles de représenter une barrière à l'entrée pertinente sur ce marché. Finalement, dans le troisième chapitre, nous déterminons le(s) facteur(s) permettant d'expliquer le schéma et la configuration du marché mondial du charbon thermique. Pour ce faire, nous modélisons théoriquement le comportement des exportateurs et leur stratégie d'entrée face à des coûts unitaires du fret et du transport maritime sur le marché mondial dans un cadre structurel prédéfini en amont. / Despite the environmental and climate concerns, steam coal is still the first thermal energy used in the electricity generation worldwide. Faced to an increasing global demand, the steam coal seaborne market is developing considerably. From the 2000s, the steam coal maritime market faces several economic structural changes. The aim of this PhD dissertation is to bring a structural analysis of the steam coal maritime market from the 2000s. Through this research, we want to determine the economic and institutional factors helping to explain the configuration of the market. This PhD thesis involves three chapters. In the first chapter, we define the market over product space. Then, we describe the value chain of the steam coal industry in order to highlight the factors explaining the evolution of the industry, particularly by the oil crisis in the 1970s. In the second chapter, we empirically analyze the configuration of the steam coal maritime market and its evolution from 2000 to 2010. This analysis emphasizes the degree by which the seaborne transport costs and freight costs may represent a relevant barrier to entry on the market. Finally, in the third chapter, we determine the factor(s) explaining the schema and the configuration of the world steam coal market. To do so, we model the exporters’ behavior and their entry strategy faced to unit freight and seaborne costs in a predefined market structure.

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