This dissertation addresses the question of whether a monopolistic banking system can lead to a higher steady state level of capital stock. Specifically, this research analyzes the comparative advantage of a monopoly banking system. By doing that, it examines factors that contribute to the promotion of economic growth that come from a concentrated banking system. There is substantial evidence of a positive relationship between financial markets development and long term output growth. Little is known, however, about the role played by the market structure of the banking sector on growth. Moreover, little work, if any, has attempted to analyze how the degree of information externality affects the relative performance of a monopoly and competitive banks. I find that a monopoly banking system might perform better in accumulating capital under both low information externality and high information externality under certain conditions. In addition, this paper shows that developing countries as well as industrial countries may benefit from a concentrated banking system. This result is not found in the existing literature, which has only shown that developing countries may benefit from a monopoly banking system. This result can be interpreted as follows: (i) for the developing countries, as the proportion of high quality firms is relatively low, the loss in output associated with lending capital to lower quality firms is relatively high. In this case, the screening technology has enough value-added to compensate for the loss in output associated with the typical rent extraction activity of the monopolist. (ii) for the industrial countries, a monopoly banking system can overcome inefficiency from free riding problem associated with the information externality. This analysis provides an alternative explanation of the recent deregulation and resulting trends in mergers and acquisitions. This supports governments' policy changes from restricting merger and acquisition activity to allowing or even promoting merger and acquisition activity.

This dissertation addresses the question of whether a monopolistic banking system can lead to a higher steady state level of capital stock. Specifically, this research analyzes the comparative advantage of a monopoly banking system. By doing that, it examines factors that contribute to the promotion of economic growth that come from a concentrated banking system. There is substantial evidence of a positive relationship between financial markets development and long term output growth. Little is known, however, about the role played by the market structure of the banking sector on growth. Moreover, little work, if any, has attempted to analyze how the degree of information externality affects the relative performance of a monopoly and competitive banks. I find that a monopoly banking system might perform better in accumulating capital under both low information externality and high information externality under certain conditions. In addition, this paper shows that developing countries as well as industrial countries may benefit from a concentrated banking system. This result is not found in the existing literature, which has only shown that developing countries may benefit from a monopoly banking system. This result can be interpreted as follows: (i) for the developing countries, as the proportion of high quality firms is relatively low, the loss in output associated with lending capital to lower quality firms is relatively high. In this case, the screening technology has enough value-added to compensate for the loss in output associated with the typical rent extraction activity of the monopolist. (ii) for the industrial countries, a monopoly banking system can overcome inefficiency from free riding problem associated with the information externality. This analysis provides an alternative explanation of the recent deregulation and resulting trends in mergers and acquisitions. This supports governments' policy changes from restricting merger and acquisition activity to allowing or even promoting merger and acquisition activity.

Cette thèse examine l'impact de la structure du marché bancaire sur l’activité économique et les contraintes financières des petites et moyennes entreprises (PME) et l'efficacité des banques au niveau local. Il comprend trois chapitres empiriques. Le premier chapitre s’intéresse à l’impact du relationship banking sur les contraintes financières des PME et s'appuie sur deux indicateurs alternatifs pour saisir différentes dimensions de ces contraintes. Les résultats soulignent le rôle ambigu de la proximité bancaire et de la relation client face aux contraintes financières des PME. Sur la période 2005-2013, la présence accrue de banques régionales ou géographiquement concentrées contribue à atténuer les contraintes de crédit à court terme des PME françaises mais accroît leur sensibilité aux flux de trésorerie liés aux investissements. En outre, dans les deux cas, les contraintes financières des PME sont renforcées sur des marchés distants sur le plan fonctionnel. De plus, en période de crise, les avantages de la relation bancaire sur la contrainte de crédit à court terme demeurent et, dans certains cas, sont renforcés. Nous constatons également que la présence accrue des banques régionales facilite l'accès au crédit à court terme pour les entreprises plus rentables avant la crise financière mondiale et particulièrement pour celles qui ont connu une forte baisse de leur rentabilité en période de crise. Le deuxième chapitre analyse l’impact des relations de crédit via une plus grande proximité bancaire sur l’activité économique réelle, en s’appuyant à la fois sur des données individuelles de firmes et sur des données macroénomiques au niveau des départements. Il s’intéresse également à l’impact différencié de cette proximité en fonction du degré de dépendance au financement externe des PME françaises sur la période 2005-2013. Nos résultats révèlent que la relation de crédit via une plus grande proximité bancaire est bénéfique pour l'activité économique des PME en temps normal et en période de crise. De plus, parmi ces PME, les avantages de la proximité bancaire sont les plus importants pour les micro-entreprises. De plus, nos résultats montrent une forte hétérogénéité dans l’impact de la structure du marché bancaire local en fonction du degré de dépendance vis-à-vis du financement extérieur. Notre analyse macroéconomique montre également que une plus forte proximité bancaire a un impact positif sur l’emploi et stimule la croissance de l’activité économique. Le troisième chapitre analyse l’impact l'impact des caractéristiques des banques et des marchés locaux sur l'efficacité des succursales bancaires. Cette analyse s’appuie sur un ensemble données détaillé au niveau des succursales en Chine sur la période 2008-2011. Nos résultats suggèrent que les caractéristiques des marchés tant locaux que bancaires affectent l’efficacité des succursales bancaires. Les succursales de banques appartenant à l'État ont l’efficience-profit la plus forte mais l’efficience-coût la plus faible, tandis que les succursales de banques étrangères ont l’efficience-profit la plus élevée. En outre, la concurrence des banques et le développement économique sur le marché local contribuent à promouvoir l'efficacité des succursales. De plus, l’efficacité des banques et l’efficacité du marché bancaire local peuvent influer sur l’efficacité des succursales, l’impact de l’efficacité des banques étant économiquement plus important. Nos résultats suggèrent que la structure du marché bancaire local a un impact statistiquement et économiquement significatif sur l’activité économique et les contraintes financières des PME, l'activité économique réelle et l'efficacité des banques. Les superviseurs bancaires et les régulateurs doivent veiller à maintenir un environnement bancaire diversifié, garantissant la présence de banques locales et géographiquement concentrées, et à renforcer la concurrence des banques afin de stimuler la croissance économique. / This dissertation examines the impact of banking mar ket structure on SMEs financial constraints, real economic activity and bank efficiency at a local level. It comprises three empirical essays as three chapters, the first two chapters are on French banking market and the third one is on Chinese banking mar ket. The first chapter investigates the relevance of relationship lending for SMEs and continuation lending during crisisrelying on two alternative indicators to capture different dimensions of SMEs financial constraints. The findings emphasize the ambiguous role of banking proximity and of relationship banking on SMEs financial constraints. Over the 2005-2013 period, for French manufacturing SME s, higher presence of regional banks or of geographically-focused banks help to alle viate their short-term credit constraint, while lar germarket share of national banks or stronger presence of geographically-diversified banks is beneficial to reduce their investment cash-flow sensitivity. Moreover, in both cases, SMEs’ financial constraints are strengthened in functionally-distant mar kets. In addition, during crisis times, the benefits of relationship banking on short-term credit constraint remains and, insome cases, are reinforced. We also find that these benefits differ according to SMEs pre-crisis financial health, in line with pre vious findings of continuation lending during crisis.The second chapter analyzes the impact of relationship lending through a stronger banking proximity on real economic activity at both firm le vel and county (department) level and the heterogeneity of this impact based on SMEs external financial dependence in France over the 2005-2013 period. Our results confirm the benefits of elationship banking for SMEs as highlighted in the pre vious chapter. A stronger banking proximity is beneficial to SMEs’ economic activity in both ormal and crisis times, even after controlling for times, county, industry and firm level characteristics, and these benefits are stronger for micro firms, the smallest and more informationally-opaque SMEs. In addition, our results show a significant heterogeneity in the impact of local banking market structure among small firms depending on the le vel of dependence on external finance. Further, our macroeconomic analysis also provide evidence that local banking market structure has statistically and economically significant impact on economic activity. The third chapter analyzes the finance-growth nexus from a different perspective by investigating what drives bank branch efficiency. Three efficiency measures are adopted to estimate the impact of bank and local market characteristics on bank branch efficiency using a detailed branch-level dataset in China over the 2008-2011 period. Our findings suggest that both bank and local market characteristics affect bank branch efficiency. Branches of state-own banks are the most profit efficient and least cost efficient, while branches of foreign banks are the most cost efficient. In addition, bank competition and economic development in local market help promote branch efficiency. In addition, both bank efficiency and local banking market efficiency can affect branch efficiency, and the impact of bank efficiency is econ omically more significant. Our findings suggest that local banking market structure has a statistically and economically significant impact on small business lending, real economic activity and bank efficiency, bank supervisors and regulators should pay at tention to maintain a diversified banking environment, guaranty the presence of local and geographically-focused banks, and enhance bank competition to stimulate growth.