Does monetary policy affect the real economy? If so, what is the transmission mechanism or channel through which these effects occur? These two questions are among the most important and controversial in macroeconomics. This dissertation presents some new empirical evidence that addresses each question for the U.S. and Chinese economies. Literature on monetary transmission suggests that the monetary policy can take effect on the real economy through several ways. The most noteworthy one is credit channels, including the bank lending channel and the interest channel. First, I use a new method to test for structural breaks in the U.S. monetary policy history and present some new empirical evidence to support an operative bank lending channel in the transmission mechanism of monetary policy. Results show that an operative bank lending channel existed in 1955 to 1968, and its impact on the economy has become much smaller since 1981, but it still has a significant buffering effect on output by attenuating the effect of the interest channel. Second, I adopt the recently developed time series technique to explore the puzzling negative correlation between output and stock returns in China currently, and posit that it is due to a negative link between monetary policy and stock returns when monetary policy increases output. The monetary policy has not been transmitted well in the public sector which is the principal part of Chinese stock market, and increased investment capital from monetary expansion goes to real estate sector instead of the stock market. Last, I demonstrate how monetary policy has been transmitted into the public and private sectors of China through the credit channel. The fundamental identification problem inherent in using aggregated data that leads to failure in isolating demand shock from supply shock is explicitly solved by introducing control factors. I find that the monetary policy has great impact on private sector rather than public sector through credit channel in China. These findings have important practical implications for U.S. and China’s economic development by improving the efficiency of the monetary policy because a comprehensive understanding of monetary transmission will lead to better policy design.

In the thesis, we examine the bank lending channel and the effect of banking market structure on the transmission of monetary policy in Georgia, Armenia, and Azerbaijan. We employ bank-level data for the period of 2011-2017 to detect if banks with different characteristics react differently to monetary policy shocks. Banking market structure is proxied by three measures-CR5, HHI, and Lerner Index. We estimate two types of models: dynamic (with system GMM) and static (with FE) models. We also consider the effect of dollarization on bank loan supply as well as on monetary policy. We do not find consistent evidence that banks react differently to monetary policy shocks depending on bank characteristics (size, capitalization, and liquidity). Hence the existence of the lending channel is not conclusive. Nevertheless, the results show that monetary policy is less effective in more concentrated markets. This finding is robust in all specifications with both types of models. In this sense, competition is not significant. The results also suggest that dollarization weakens the effect of domestic monetary policy. Keywords bank lending channel, CR5, HHI, Lerner Index, system GMM, dollarization Author's e-mail t.jvarize@yahoo.com Supervisor's e-mail janxmares@gmail.com

Cette thèse se compose de trois articles qui s’insèrent dans une même problématique sur les interrelations entre les secteurs financier et réel en Corée du sud. Notre analyse empirique a vérifié le bon fonctionnement de certains composants du mécanisme de transmission entre les secteurs financier et réel. Tout d'abord, nous avons constaté que le canal du crédit bancaire a fonctionné comme l'un des canaux de transmission de la politique monétaire (Chapitre1). Ensuite, nous avons vérifié empiriquement que la capitalisation des banques est un facteur important dans la transmission des chocs de politique monétaire (Chapitre2). Enfin, notre analyse sur l’interaction entre le prix de l’immobilier et le crédit bancaire a montré qu’il existait une relation à long terme entre les prix de l'immobilier et les prêts bancaires (Chapitre 3). Comme vérifié empiriquement dans notre analyse, le secteur financier et le secteur réel sont étroitement liés par le choc financier ou réel. Les résultats mettent en valeur les points suivants vis-à-vis des politiques monétaires et de supervision. Premièrement, il est important que la politique monétaire prenne en compte la régulation du capital et son effet sur l’économie. Deuxièmement, en prenant en compte le fait que le prêt hypothécaire est très étroitement lié à la conjoncture économique en Corée, l’instrument de la politique macroprudentielle pour réduire la procyclicité est nécessaire. La banque centrale et l’autorité prudentielle peuvent collaborer à développer ces instruments. / This thesis consists of three Articles that fit into the same issue on the interrelationships between the financial and real sectors in South Korea. Our empirical analysis has verified the correct functioning of certain components of the transmission mechanism between the financial and real sectors. Firstly, we found that the bank lending channel has functioned as one of the transmission channels of monetary policy (Chapter 1). Then, we verified empirically that the capitalization of banks is an important factor in the transmission of monetary policy shocks (Chapter 2). Finally, our analysis of the interaction between property prices and bank lending has shown that there is a long-term relationship between property prices and bank lending (Chapter 3). As empirically verified in our analysis, the financial sector and the real sector are closely linked through shocks, either financial or real. The results highlight the following points vis-à-vis the monetary policy and macroprudential policy. First, it is important that monetary policy takes into account the capital regulation and its effect on the economy. Second, taking into account the fact that the mortgage is very closely linked to the economic situation in Korea, macroprudential policy instruments is required to reduce procyclicality. The central bank and the supervisory authority can collaborate to develop these instruments.

Cette thèse étudie le secteur bancaire du Luxembourg sous trois angles différents. Elle apporte de nouveaux éléments de débat sur un secteur bancaire souvent commenté mais rarement étudié. En outre, dans chacun des trois chapitres, les impacts de la crise financière sont étudiés. Chapitre 1: Création de liquidité par les banques du Luxembourg. Ce chapitre évalue la quantité liquidité créée par les banques. Nous constatons que cette création a plus que doublé entre 1999 et 2011. Cependant, la liquidité créée a commencé à diminuer en 2009 et en 2011, elle n’était toujours pas revenu au niveau d'avant la crise. Chapitre 2: Le canal du crédit bancaire au Luxembourg. Nous trouvons un canal du crédit opérationnel qui fonctionne essentiellement via la capitalisation des banques sur base agrégée. Nous démontrons également que les banques ont préservé la disponibilité du crédit lors de la crise financière. Chapitre 3: Rentabilité bancaire au Luxembourg dans un environnement de taux bas. Nous constatons qu’à long terme, le niveau et la pente de la courbe des taux contribuent positivement à la rentabilité bancaire, par conséquent, que les taux d'intérêt actuellement bas ont un effet négatif sur la profitabilité des banques. / This dissertation studies the banking sector of Luxembourg under three different angles. It therefore contributes to provide new evidence on an often commented but rarely investigated banking industry. Furthermore, in each of the three chapters, the impacts of the financial crisis are studied. Chapter 1: Bank liquidity creation in Luxembourg. This chapter assesses how much liquidity banks in Luxembourg have created. We find that liquidity creation has more than doubled between 1999 and 2011. However, the level of liquidity created started to decrease in 2009 and in 2011, was still not back to pre-crisis level. Chapter 2: The bank lending channel in Luxembourg. We find an operative bank lending channel in Luxembourg, which works through capitalization on an aggregated basis. Regarding the financial crisis, we underlined that banks preserved the availability of credit.Chapter 3: Bank profitability in Luxembourg in a low interest rate environment. We find that, in the long-run, the level and the slope of the yield curve contribute positively to bank profitability and hence that the current low interest rates have a negative effect on banks’ profits.

Submitted by ANDRE BARBOSA COSTA (andre.costa@gvmail.br) on 2014-02-26T23:47:30Z No. of bitstreams: 1 Dissertacao_Andre_BC_Transmissao assimetrica de um choque de liquidez.pdf: 1259504 bytes, checksum: 375f9b57703873d30be47f24f90832c3 (MD5) / Approved for entry into archive by Suzinei Teles Garcia Garcia (suzinei.garcia@fgv.br) on 2014-02-27T11:51:09Z (GMT) No. of bitstreams: 1 Dissertacao_Andre_BC_Transmissao assimetrica de um choque de liquidez.pdf: 1259504 bytes, checksum: 375f9b57703873d30be47f24f90832c3 (MD5) / Made available in DSpace on 2014-02-27T12:32:31Z (GMT). No. of bitstreams: 1 Dissertacao_Andre_BC_Transmissao assimetrica de um choque de liquidez.pdf: 1259504 bytes, checksum: 375f9b57703873d30be47f24f90832c3 (MD5) Previous issue date: 2014-02-13 / Esta dissertação estuda o impacto do choque de liquidez no sistema financeiro nacional (SFN) sobre o crédito às empresas após a quebra do Lehman Brothers, em setembro/2008. O choque ocorreu de forma diferenciada aos players do mercado nacional, de modo que algumas instituições financeiras passaram por forte restrição de recursos, ao passo que outras receberam um volume acentuado de depósitos. Para expurgar possíveis efeitos de demanda por crédito, utiliza-se a abordagem de efeitos fixos por atividade econômica, de modo que os coeficientes estimados reflitam a oferta de crédito dos bancos. Os resultados obtidos corroboram, em diferentes graus, as hipóteses delineadas, com destaque para dois pontos: (i) a elasticidade do crédito empresarial aos depósitos é diferente entre os grupos de bancos que têm aumento ou diminuição desta forma de funding, fato consistente com os modelos que preveem que os agentes tendem a manter mais liquidez em um contexto de incerteza sistêmica; (ii) com a escassez de recursos externos e do mercado de capitais nacional após a quebra do Lehman Brothers, as grandes empresas tiveram que recorrer ao segmento bancário, e na disputa pelos recursos oriundos desta fonte levaram vantagem comparativa em relação às pequenas e médias empresas.

Abstract China’s outstanding growth performance of recent years, the ongoing liberalisation of its capital market, and its deepening integration into the world economy provide ample motivation for a deeper understanding of the country’s economic policy-making. This dissertation is an attempt to better understand monetary policy operations and transmission in this rapidly evolving situation. Monetary policy in China is unique compared to any other country in terms of both the available policy instruments and the policy environment. The policy regime is transitioning to a more market-orientated one, and presently the central bank uses a mixture of quantity-based and price-based instruments. These special features are addressed in this dissertation. The dissertation is comprised of four independent but related essays that empirically evaluate monetary policy implementation and the policy environment in China. The first essay examines the relevance of a quantity-based McCallum-type policy rule in achieving price stability. The findings are that deviations in money supply from the rule help to forecast price developments and thus underline the relation between money supply and prices in China. The second essay considers a wider selection of possible policy rules and examines the monetary policy implementation and instruments used by the central bank. Money supply and interest rate instruments are found to react differently to price and output developments. The interest rate instrument is gaining weight over time, which highlights China’s transition to a more market-based policy setting. The third essay utilises bank-level data to study monetary policy transmission and the existence of the bank lending channel in China. Changes in the reserve requirement ratio are found to affect bank lending in China in a similar manner as changes in interest rates. Different types of banks (by ownership) react differently to these changes, but no robust evidence of a bank lending channel is found. The fourth essay compares the economic dynamics in a DSGE modelling framework under the assumption that China can successfully rebalance its economy and achieve a lower savings rate and higher level of domestic consumption. The rebalancing does not notably affect the transmission of monetary policy shocks, but it does render the economy more resilient to technology shocks. / Tiivistelmä Kiinan nopea talouskasvu, pääomamarkkinoiden avaaminen ja maan tiiviimpi kytkeytyminen maailmantalouteen ovat johtaneet siihen, että Kiinan talouspolitiikan ymmärtäminen on aiempaa tärkeämpää. Tämän väitöskirjan tavoitteena on perehtyä Kiinan rahapolitiikkatoimiin ja politiikan välittymiseen nopeasti muuttuvassa ympäristössä. Rahapolitiikka Kiinassa eroaa muiden maiden rahapolitiikasta niin käytössä olevien instrumenttien kuin politiikkaympäristönkin kannalta. Kiina on siirtymävaiheessa kohti markkinaperusteisempaa rahapolitiikkaa, ja tällä hetkellä maan keskuspankki käyttää sekä hinta- että määräperusteisia instrumentteja. Näitä erityispiirteitä tarkastellaan tähän väitöskirjaan sisältyvissä tutkimuksissa. Väitöskirja koostuu neljästä yksittäisestä mutta toisiinsa liittyvästä esseestä, joissa tarkastellaan empiirisesti rahapolitiikan toteutusta sekä politiikkaympäristöä Kiinassa. Ensimmäisessä esseessä käsitellään määräperusteisen McCallum-rahapolitiikkasäännön käyttökelpoisuutta hintavakaustavoitteen saavuttamisessa. Havaitut poikkeamat säännön suosittelemasta rahamäärän kasvusta parantavat inflaatioennusteita, mikä korostaa rahan tarjonnan ja hintakehityksen välistä suhdetta. Toisessa esseessä hyödynnetään useampia mahdollisia rahapolitiikkasääntöjä ja tarkastellaan rahapolitiikan toteutusta ja keskuspankin käyttämiä politiikkainstrumentteja. Rahan tarjonnan ja korkoinstrumentin havaitaan reagoivan eri tavoin hintakehitykseen ja tuotannon kasvuun. Korkoinstrumentin painoarvo kasvaa ajan kuluessa, mikä osoittaa Kiinan olevan siirtymässä kohti markkinaperusteisempaa politiikkaa. Kolmannessa esseessä hyödynnetään pankkikohtaista aineistoa ja tarkastellaan rahapolitiikan välittymistä ja pankkilainakanavan olemassaoloa. Keskuspankin varantovaatimusmuutosten havaitaan vaikuttavan pankkien lainanantoon samalla tavoin korkomuutosten kanssa. Omistustyypin mukaan jaoteltuna erilaiset pankit reagoivat eri tavoin rahapolitiikan muutoksiin. Tutkimuksessa ei kuitenkaan löydy vankkaa tukea pankkilainakanavan olemassaololle. Neljännessä esseessä tarkastellaan talouden dynamiikkaa DSGE-mallikehikossa olettaen, että Kiina onnistuu tasapainottamaan talouttaan niin, että säästämisaste laskee ja kotimaisen kulutuksen osuus taloudessa kasvaa. Tasapainottaminen ei merkittävästi vaikuta rahapolitiikkasokkien välittymiseen, mutta tekee taloudesta vähemmän herkän teknologiasokeille.

本文以1999年第4季至2011年第3季24家銀行的追蹤資料，分析銀行資本與金融控股體系對銀行放款管道的影響。全體樣本銀行的實證結果顯示，沒有顯著證據支持放款管道的存在。銀行淨值及調整成本對放款有顯著的影響，支持銀行資本管道存在。另外，銀行加入金融控股體系之後，調整成本的影響增加。 大型銀行樣本的實證結果顯示，大型銀行放款管道的作用不顯著；但是，銀行資本管道呈現顯著影響。小型銀行放款管道及資本管道皆沒有顯著證據支持兩者存在，但非存款負債對小型銀行放款的影響顯著。除此之外，小型銀行在金融控股體系下，短期投資及非存款負債對放款的影響顯著。由此結果可知，大小型銀行皆可藉由資產負債的調整來抵銷貨幣政策的衝擊，維持放款的成長。

Après Septembre 2008, du fait du gel du marché interbancaire, d’un manque de liquidité, d’une perte de confiance et des difficultés des institutions financières, la transmission de la politique monétaire au sein de la zone euro a été sévèrement altérée. La Banque Centrale Européenne (BCE) a donc dû avoir recours à des politiques monétaires non-conventionnelles. En considérant, au sein de la zone euro, les contraintes imposées à la banque centrale et la fragmentation des marchés financiers, l’objectif de cette thèse empirique est d’évaluer les canaux de transmission des politiques monétaires conventionnelles et non-conventionnelles de la BCE. Les comportements de prêts des banques étant liés à leurs coûts de financement, le premier essai se focalise sur le canal de transmission des prêts bancaires. Il étudie l’évolution des activités de prêts syndiqués d’institutions financières européennes et leur réaction aux politiques de la BCE. La communication de la banque centrale revêt une importance toute particulière dans une union monétaire. Les deuxième et troisième essais se concentrent sur le canal des signaux. Le deuxième essai étudie sur la communication durant les conférences de presse mensuelles ainsi que ses effets sur la prévisibilité des décisions de politique monétaire et sur les rendements et la volatilité des marchés financiers. Le dernier essai se focalise sur l’utilisation du guidage des taux d’intérêt futurs, une communication non-conventionnelle informant les marchés du niveau futur des taux d’intérêt de court-terme. Il étudie l’efficacité de cette annonce et sa capacité à influencer les prévisions de taux d’intérêt faites par les acteurs de marché. / After September 2008, due to a frozen interbank market, shortage of liquidity, loss of confidence, and collapsing financial institutions, the monetary policy transmission in the euro area was severely impaired. Under thus exceptional circumstances, the European Central Bank (ECB) had to turn to non-standard monetary policy measures. Considering, in the euro area, the constrained range of actions and fragmented financial markets, the objective of this empirical thesis is to assess the transmission channels of ECB standard and non-standard monetary policies and their effects on both financial markets and the economy.As banks’ lending behaviors are related to their financing costs, the first essay focuses on bank lending channel. It studies the evolution of lending activities of European financial institutions on the syndicated loan market and its reaction to the ECB standard and non-standard policies. The communication of the central bank is of utmost importance in a monetary union with heterogeneous, in terms of economic situations and cultures, countries. The second and third essays study the signaling channel of monetary policy. The second essay focuses on the communication during monthly press conferences and their effects on the predictability of monetary policy decisions and on financial markets returns and volatility. The last essay concentrates exclusively on the use of \textit{forward guidance} on interest rate, a non-standard central bank communication providing information on future short-term interest rates. It discusses its effectiveness and ability to lower market participants expected interest rates.

Diese Dissertation besteht aus drei Essays, welche den monetären Transmissionsmechanismus via das Kreditangebot von Banken in einem Umfeld mit Überschussreserven analysieren. Im ersten Aufsatz wird die Effekten der 2008 Handlungsrahmens Änderungen der Fed auf den Transmissionsmechanismus untersucht. Ich schätze die Reaktionen in der Periode vor 2008 und zeige, dass den Bankkreditkanal aktiv ist. In der Periode nach 2008 steigen Bankkredite nach eine Geldpolitikkontraktion. Ich habe ein Regimewechsel-TANK Modell entwickelt, um den Transmissionsmechanismus über beide Systeme zu vergleichen. Das Modell zeigt, dass nach einem kontraktiven Schock unter dem alten System die Produktion sinkt, und, dass unter einem neuartigen System das Kreditangebot stimuliert. Dies ist aufgrund einer Friktion der Fall, die durch die Liquiditätsmanagementkosten der Banken verursacht wird. Im zweiten Aufsatz analysiere ich ob der Bankkreditkanal in den USA nach der Finanzkrise vorhanden ist. Dieser Kanal stützt sich auf die Annahme verbindlicher Reserveanforderungen. Ich finde Belege für den Kreditvergabekanal vor der Finanzkrise. Seit der Krise ist der Bankkreditkanal nicht mehr vorhanden. Stattdessen ist eine kontraktive Geldpolitik jetzt mit lockereren Liquiditätsbeschränkungen verbunden, und somit mit einem Anstieg der Bankkredite. Im dritten Aufsatz, D. Zander und ich identifizieren heterogene Bankenreaktionen auf geldpolitische Schocks in den USA. Unter Verwendung von einem informationsrobusten Instrument, zeigen wir, dass der Grad der Bargeld-Liquidität systematisch beeinflusst, wie Banken infolge eines geldpolitischen Schocks ihr Kreditvergabeverhalten ändern. Wir finden, dass nach einem kontraktiven Schock hochliquide Banken mit einer Ausweitung der Kreditvergabe reagieren, während weniger liquide Banken eine gedämpfte Antwort zeigen. Wir zeigen, dass das Vernachlässigen von Informationseffekten zu qualitativ unterschiedlichen Ergebnissen für liquide Banken führt. / This dissertation consists of three essays that analyze the monetary transmission mechanism via banks’ credit supply to the real economy under an environment of excess reserves. The first essay, examines the effects of the Fed’s 2008 operational system switch on the transmission mechanism of monetary policy. In the pre-switch sample the bank-lending channel is shown to be active, while in the latter sample, bank loans increase after a monetary contraction. Additionally, a regime-switching TANK model is used to compare the transmission mechanism across both systems. Under the old-style system real activity declines after a monetary contraction, while under a new-style system, monetary tightening stimulates credit supply, due to the presence of a friction introduced by banks’ liquidity management costs. The second essay analyzes whether the bank-lending channel is still present in post financial crisis U.S. data. This channel relies on the key assumption of binding reserve requirements, which is at odds with post-crisis data. Using a two-step regression approach, I find evidence supporting the lending channel in the subsample prior to the crisis. Moreover, since the crisis the lending channel is no longer active. Instead, monetary tightening is associated with looser liquidity constraints, and thus, with bank lending growth. The third essay is joint work with D. Zander. We identify heterogeneous bank reactions to monetary policy shocks in the U.S. using macro-econometric techniques and micro-level data. Using an informationally-robust instrument we show that the degree of cash-liquidity systematically influences banks’ lending behavior. Concretely, after a contractionary shock, liquid banks (those with excess reserves above 1% of assets) react by expanding lending, whereas less liquid banks have a muted response. We show that neglecting to control for the information effects of monetary policy, yield qualitatively different results that are at odds with economic theory.