Cette thèse s'intéresse à plusieurs aspects des marchés de gros de l'électricité. L'achat et vente d'électricité se négocient sur les marchés à terme et sur le marché day-ahead. Sur ce dernier se pratique un type d'enchère très spécifique, où les enchères des acteurs prennent la forme de fonctions d'offre et de demande. Chapitre 2 prend comme point de départ un résultat de Zachmann et von Hirschhausen (2008) qui constatent une réponse asymétrique du prix de gros de l'électricité en Allemagne au changement du prix des permis d'émission négociable ( EUA ). Cependant, en contradiction avec les résultats existants, il est démontré que l'asymétrie a disparu suite à la publication d'un rapport d'enquête par l'autorité de la concurrence. Chapitre 3 porte sur l'interaction des marchés à terme et day-ahead dans un jeu d'oligopole répété. L'effet du marché à terme sur la stabilité des collusions est étudié dans le cas où les stratégies sur le marché spot prennent la forme des fonctions d'offre. Il est démontré que la simple existence d'un marché à terme peut élargir l'intervalle des valeurs du facteur d'actualisation pour lesquelles la collusion est soutenable. Chapitre 4 examine si une réaction asymétrique au changement du prix du C02 est également présente dans les fonctions d'offre du marché d'électricité day-ahead. À cette fin, les outils de l'analyse des données fonctionnelles sont adoptés et appliquées à des données des enchères. Chapitre 5 développe un test pour l'auto-corrélation dans un panel d'observations fonctionnelles. Une simulation Monte-Carlo montre une bonne puissance du test dans des échantillons de taille habituellement utilisé dans la recherche appliquée. / This thesis addresses aspects of interacting markets in electricity wholesale. Electricity is traded in forward markets and in day-ahead auctions, which implement a very specifie market design. The bids of market participants take the fonn of supply and demand functions. Chapter 2 builds upon a finding of Zachmann and von Hirschhausen (2008) who report an asymmetric response of electricity wholesale prices for Gennany to changes in the price of EV Emission Allowances (EVA). ln contrast to the fonner contribution, it is shown that the asymmetry disappeared in response to a report on investigations by the competition authority. Chapter 3 addresses the interaction offorward markets and day-ahead auctions in a repeated oligopoly game. The effect offorward trading on the sustainability of collusion is studied for the case that spot market strategies take the fonn of supply functions. It is shown that the existence of forward markets enlarges the range of discount factors for which collusion can be sustained. Chapter 4 examines if an asymmetric reaction to EVA prices can also be found in the supply functions from the day-ahead market. To this end, tools from the field of functionaJ data analysis are adopted and applied to observed bids from the day-ahead auction. Chapter 5 develops a test for autocorrelation in functional panel data. Asymptotic nonnality of the statistic is proved, and Monte-Carlo simulation sho\l good power of the test in sample sizes which frequently prevail in applied research.

This thesis analyses the necessity for the establishment, main functions and the viability of the Turkish Wholesale Electricity Trading and Contracting Company, TETAS in the short, mean and the long term. In order to understand the necessity for the establishment of TETAS, Turkish Energy Policies such as the state-led energy policies and the competition based market orientation are put under scrutiny. The thesis also discusses whether Turkish Government has carried out a comprehensive, deterministic and effective &ldquo / Liberalization Policy&rdquo / in the electricity sector by looking at the present situation and the principles outlined in Laws No: 4628, 5654 and 5686 and the Strategy Paper. The dissertation then examines the life span of TETAS by looking at the impacts of the strategy paper, liberalization procedure of the overall electricity market and newly enacted laws such as Law No: 5654 and 5686 in the short, mean and the long term. In addition, TETAS is examined whether it is a &ldquo / monopoly&rdquo / or not in Turkish Electricity wholesale market by calculating the supply concentration of TETAS using the Herfindahl Hirschman Index. Despite the studies on the establishment of the liberal market such as the envisagement of Law No: 4628 and the strategy paper, this thesis study envisages that it is still not possible to talk about a liberal electricity market. In addition, it is also concluded that the statements outlined in Laws No: 5654 and 5686 hinder the overall liberalization efforts since these laws are postponing the liberalization of electricity sector and making the life span of TETAS longer. As a result, liberalization efforts on the electricity market are unsuccessful in the mean term and TETAS seems to hold its dominance position in the wholesale market as a state-owned wholesale trading company in the long run.