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No description available.

Civil wars have become endemic to many African countries since the end of the Cold War. The risk of civil wars in much of Africa stands now as the leading contributory cause of vulnerability. This upsurge of civil wars has . posed a compelling need to improve understanding for better policy direction. Most of the current studies on civil wars tend to focus on macro issues with limited relevance and conceptualisation at micro level. The dearth of understanding of household livelihood strategies in the 'war zone' has made the existing studies in risk and livelihood literature unwittingly equating these strategies with those in the context of other risk events, or even ruled out any rational household risk management behaviour. In this regard, this study is an attempt to gain a nuanced understanding of the subde household livelihood strategies in the context of civil war. In an attempt to unravel and better understand household risk-related behaviours in the context of civil war, this thesis set out a framework called the Risk-Livelihood Approach that links risk events in a systematic way to household livelihood strategies and their outcomes. The framework provides the basis for fonnulating the main four hypotheses of the thesis, which are related to characteristics of risk events, livelihood strategies and diversification, social capital and vulnerability. In an attempt to provide a better understanding of these hypotheses, comparative empirical inquiries were undertaken at household level in Bahr el Ghazal region in southern Sudan, which has been exposed to a protracted civil war. The major empirical findings from a general case study of Sudan's civil war and three specific case studies of households exposed to different types of counter-insurgency warfare and drought all point to complexity and context-specificity. The thesis clearly shows the significance of specific characteristics of counter-insurgency warfare in understanding household livelihood strategies and vulnerability. In particular, the thesis demonstrates that the 'standard' pattern of vulnerability and household responses to drought is similar to that in the context of exogenous counter-insurgency warfare, while a different pattern of vulnerability and household responses to endogenous shocks, such as endogenous counter-insurgency warfare, is identified. Specifically, the thesis surprisingly finds a positive link between level of vulnerability and initial high level of household wealth in the context of endogenous counter-insurgency warfare. A future research agenda in the area of vulnerability might need to focus on developing a greater understanding of the nature and characteristics of risk events such as endogenous shocks

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Als Folge der Finanzkrise 2008/09 sind unter einigen Ökonomen Zweifel an der Adäquanz der theoretischen Modelle aufgekommen, insbesondere über diejenigen, die den Anspruch erheben, Finanzmärkte und Banken zu modellieren. Aufgrund dieser Zweifel folgen einige Ökonomen einer neuen Strömung, indem sie versuchen, ein neues Paradigma zu entwickeln, das auf einer geldwirtschaftlichen anstatt auf einer güterwirtschaftlichen Theorie beruht. Der Hauptunterschied zwischen diesen beiden Sichtweisen ist, dass in einer Güterwirtschaft Geld keine essentielle Rolle spielt, wohingegen bei einer Geldwirtschaft jede Transaktion mit Geld abgewickelt wird. Grundlegend ist es deshalb wichtig zu klären, ob eine Theorie, die Geld miteinschließt, zu anderen Schlussfolgerungen kommt als eine Theorie, die Geld außen vor lässt. Ausgehend von dieser Problemstellung stelle ich im zweiten Kapitel die Schlussfolgerungen aus der güterwirtschaftlichen Logik des Finanzsystems - modelliert durch die Loanable Funds-Theorie - der geldwirtschaftlichen Logik gegenüber. Im Anschluss an die Überprüfung der Schlussfolgerungen beschreibe ich drei Theorien über Banken. Hierbei beschreibt die sog. endogene Geldschöfpungstheorie, in der die Zentralbanken die Kreditvergabe der Banken durch Preise steuern, unsere Welt am besten. Die endogene Geldschöpfungstheorie ist die Basis für das theoretische Modell im dritten Kapitel. In diesem Modell handeln die Banken nach einem Gewinnmaximierungskalkül, wobei die Erträge aus dem Kreditgeschäft erzielt werden und Kosten des Kreditausfallrisikos sowie Kosten durch die Refinanzierung (inklusive regulatorischer Vorschriften) enstehen. Hieraus leitet sich das Kreditangebot ab, das auf dem Kreditmarkt auf die Kreditnachfrage trifft. Die Kreditnachfrage wird durch die Kreditnehmer bestimmt, die für Konsumzwecke bzw. Investitionen Kredite bei Banken aufnehmen. Aus dem Zusammenspiel von Kreditangebot und Kreditnachfrage ergibt sich der gleichgewichtige Kreditzins sowie das gleichgewichtige Kreditvolumen, das Banken an Nichtbanken vergeben. Die Angebots- und Nachfrageseite, die auf dem Kreditmarkt miteinander interagieren, werden ausgehend vom theoretischen Modell empirisch für Deutschland im Zeitraum von 1999-2014 mit Hilfe eines Ungleichgewichtsmodells geschätzt, wobei sich zeigt, dass die Determinanten aus dem theoretischen Modell statistisch signifikant sind. Aufbauend auf dem theoretischen Bankenmodell wird das Modell im vierten Kapitel um den Bondmarkt erweitert. Der Bankenkredit- und der Bondmarkt sind im Gegensatz zur Beschreibung in der güterwirtschaftlichen Analyse fundamental unterschiedlich. Zum Einen schaffen Banken Geld gemäß der endogenen Geldschöpfungstheorie. Sobald das Geld im Umlauf ist, können Nichtbanken dieses Geld umverteilen, indem sie es entweder für den Güterkauf verwenden oder längerfristig ausleihen. Aufgrund des Fokusses auf das Finanzsystem in dieser Dissertation wird der Fall betrachtet, in dem Geld längerfristig ausgeliehen wird. Das Motiv der Anbieter auf dem Bondmarkt, d.h. derjenigen, die Geld verleihen möchten, ist ähnlich wie bei Banken getrieben von der Gewinnmaximierung. Erträge können die Anbieter durch die Zinsen auf Bonds erwirtschaften. Kosten entstehen durch die Opportunitätskosten der Geldhaltung als Depositen, den Kreditausfall des Schuldners sowie Kursverluste aufgrund von Zinsveränderungen. Die geschilderte Logik basiert auf der Idee, dass Banken Geld schaffen, d.h. Originatoren von Geld sind, und das Geld auf dem Bondmarkt umverteilt wird und somit mehrfache Verwendung findet. Die beiden Märkte sind sowohl angebots- als auch nachfrageseitig miteinander verknüpft. Zum Einen refinanzieren sich Banken auf dem Bondmarkt, um die Fristentransformation, die durch die Kreditvergabe ensteht, zu reduzieren. Des Weiteren haben Kreditnachfrager die Möglichkeit, entweder Bankkredite oder Kredite auf dem Bondmarkt nachzufragen. Nach der theoretischen Darstellung des Finanzsystems bestehend aus dem Banken- und Bondmarkt folgt im fünften Kapitel die Anwendung des Modells bei Quantitative Easing. Hier ist festzustellen, dass Quantitative Easing bereits bei der Ankündigung der Zentralbank das Verhalten der Marktakteure beeinflusst. Die vier großen Zentralbanken (Bank of Japan, Bank of England, Federal Reserve Bank und Europäische Zentralbank) haben aufgrund der anhaltenden Rezession und der bereits niedrigen kurzfristigen Zinsen das unkonventionelle Instrument des Aufkaufs von Anleihen angewandt. Im theoretischen Modell beeinflusst die Zentralbank bereits durch die Ankündigung die Akteuere auf dem Bondmarkt, sodass es zu sinkenden Risikoprämien, da die Zentralbank als sog. 'lender of confidence' auftritt, zu (zumindest kurzfristig) sinkenden Zinserwartungen sowie insgesamt zu sinkenden langfristigen Zinsen kommt. Diese drei Hypothesen werden anhand empirischer Methoden für die Eurozone überprüft. / As a consequence of the financial crisis in 2008/09, some economists have expressed doubts about the adequacy of theoretical models, especially those that claim to model financial markets and banks. Because of these doubts, some economists are following a new paradigm based on a monetary theory rather than a commodity theory. The main difference between these two views is that in the commodity theory money does not play an essential role, whereas in a money economy every transaction is settled with money. It is therefore essential to clarify whether a theory that includes money comes to other conclusions than a theory that leaves money out. Based on this problem, the second chapter compares the conclusions from the commodity logic of the financial system - modeled by the loanable funds theory - with the monetary logic. Following the review of the conclusions, I describe three theories about banks. The so-called endogenous money creation theory, in which the central banks control the lending of banks through prices, describes our world best. In the third chapter, I use the endogenous money creation theory for modelling the bank credit market. In this model, banks act according to profit maximization, whereby income from lending business is generated and the costs of credit default risk and refinancing costs (including regulatory requirements) are incurred. These are the determinants of the supply of credit, which meets the demand for credit on the credit market. Credit demand is determined by borrowers who borrow from banks for consumption or investment purposes. The interplay between loan supply and demand for credit results in the equilibrium loan interest rate and the equilibrium loan volume that banks grant to non-banks. The supply and demand sides interacting on the credit market are empirically estimated for Germany over the period 1999-2014 based on the theoretical model using a disequilibirum framework, showing that the determinants from the theoretical model are statistically significant. Building on the theoretical banking model, the fourth chapter extends the model to include the bond market. In contrast to the description in the commodity theory, the bank loan market and the bond market are fundamentally different. On the one hand, banks create money according to the endogenous money creation theory. Once the money is in circulation, non-banks can redistribute it by either using it for the purchase of goods or borrowing it for longer periods. Due to the focus on the financial system in this dissertation, the case is considered in which money is lent over the longer term. The motive of the suppliers in the bond market, i.e. those who want to lend money, is similar to that of banks, driven by profit maximization. Suppliers can generate income from interest on bonds. Costs arise from the opportunity costs of holding money as deposits, the credit default of the debtor and price losses due to changes in interest rates. The logic described is based on the idea that banks create money, i.e. they are originators of money, and the money is redistributed on the bond market and thus used several times. The two markets are linked on both the supply and demand sides. On the one hand, banks refinance themselves on the bond market in order to reduce the maturity transformation resulting from lending. In addition, consumers of credit have the option of requesting either bank loans or loans on the bond market. After the description of the theoretical framework of the financial system consisting of the banking and bond market, the fifth chapter follows the application of the model for Quantitative Easing. It should be noted here that Quantitative Easing already influences the behaviour of credit consumers and suppliers when the central bank announces it. The four major central banks (Bank of Japan, Bank of England, Federal Reserve Bank and European Central Bank) have used the unconventional instrument of buying up bonds due to the continuing recession and the already low short-term interest rates. In the theoretical model, the central bank already influences bond market rates through the announcement, resulting in decreasing risk premiums, as the central bank acts as a lender of confidence, decreasing interest expectations (at least in the short term) and decreasing long-term interest rates overall. These three hypotheses are tested using empirical methods for the Euro area.

No description available.

No description available.

Esta tesis analiza dos características de los mercados financieros internacionales que no son totalmente comprendidos en economía: El sesgo de los portafolios de inversión hacia papeles de la misma nacionalidad del inversionista y el financiamiento de proyectos de largo plazo con deuda de corto plazo en economías emergentes. El primer capítulo considera el efecto de las perturbaciones de demanda combinadas con rigideces nominales en la formación de portafolios de inversión y cómo esto lo sesga hacia inversiones domésticas. El segundo capítulo analiza cómo la existencia de deuda de corto plazo, al generar riesgo de iliquidez, permite a los inversionistas internacionales obtener tasas de interés más altas que las que obtendrían en inversiones nacionales. Luego el capítlo presenta una explicación de cómo la estructura financiera internacional puede llevar a que el mercado genere préstamos de corto plazo para beneficiar a los inversionistas internacionales en detrimento de las economías emergentes

We establish a set of US stylized facts on prices, quantities and balance sheets, assess the consistency of the current generation of financial DSGE models to these, and provide guidance on the challenges ahead. We mainly find four aspects which future financial friction models should take into acc~unt. The first is the profound shift in household financing structure, botli on the asset and liability side, which has meant that they have been left vulnerable. Second, the balance sheet of firms has become increasingly lever aged and coupled with more volatile and pro cyclical equity prices has rrieant that the balance sheet of firms has become ihcreasirlgly procyclical and volatile since the 1990's. The current generation of FA models do capture some aspects of this but produce excessively smooth results. Third, it would be of interest for policy makers to find the optimal level/percentage of foreign ownership of the Federal debt at which the debt portfolio is diversified, but the future government budget constraint and its stabilisation capacity is not put in danger by over-exposure to international shocks. Lastly, models might be extended to include a regime-switching mechanism and explore the effects on model dynamics and model stability when the economy goes from a low volatility-low correlation state to a high volatility-high correlation state. A wider implication of our findings is that accumulation of stocks might alter agents risk preferences, production technologies, or beliefs to such a degi'ee that the optimization problem that those agents face has transformed over time .. The economy is effectively in a different state of nature, and agents may face c;lifferent constraints. Future macroeconomic models need to take a different strategy to modelingthe long-run ratios, since these have increased over the long-run, and .this has had an effect on boththe frequency and the amplitude of the business cycles. Chapter 2 Following recent observations by policymakers of the Bank of England and others that low financial market confidence and pessimistic expectations about bank (and non-bank fii'm) profits over the next three years has lead to unusually low price-to-book ratios, we incorporate a market price mechanism in a general equilibrium framework. More specifically, we introduce an endogenous wedge between inarket and book value of capital, and make investment a function of the wedge in a standard financia1 accelerator model. The price wedge is driven by an information set containing expectations about the future state of the economy. The result is that the impulse responses to exogenous disturbances are some two to three times more volatile than in the benchmark financial accelerator model. Moreover, the model offers an improved matching in firm variables and financial rates to US data compared to the standard Bernanke, Gertler and Gilchrist (1999) model. We also derive a model based quadratic, loss function and measure the extent to which \ monetary policy can feed a bubble by further loosening the credit market frictions that entrepreneurs face. In addition, we take into account the possibility that policymakers have incomplete information about the current state of. the economy and therefore make errors type I and II in deciding what policy to implement. A policy that explicitly targets stock market developments can be shown to improve welfare in terms of miriimizing the consumption losses of consumers, even when we account for a degree of incomplete information of central bankers regarding the current state of the economy. To conclude, we find that for a monetary authority to be indifferent betweeri responding and not responding to stock market developments, the probability of an economy with a positive asset price wedge needs to be between 2 and 6 percent lower than the probability of an economy without a wedge. Chapter 3 Locating the appropriate degree of interaCtion between fiscal and monetary policy . plays remains a key issue in ensuring economic stability. Their joint impact is, however, still unclear. We use a Bayesian TVP-VAR model with a tight identification scheme to examine the interaction between the two policies between 1979 and 2013. We observe significant differences in the transrriission of shocks, in particular between the Great Recession and the Great Moderation. Monetary policy reacts more aggressively to stabilize the economy during Volcker, whereas fiscal policy does so during the Great Recession. Second, we find a high degree of interactions between monetary and fiscal policy. They behave as substitutes for both the spending and monetary policy shocks but as compliments for a taX, shock. Third, government revenues largely infhience decisions on spending, while spending does not influence tax decisions. Fourth, the spending multiplier is large and persistent, in particular during recessionary periods. We conclude that the spending stimuli are more effective in expanding output than tax cuts by as much as ?O percent. Under certain conditions regarding private agent expectations, spending increases can result in high and persistent growth.

This thesis sets out the case and foundations for a new way to think about, and model, Macroeconomics. This framework aims to describe the fluctuations and differing growths of economies, not in terms of the choice and exchange of Microeconomics, but rather in terms of the enforcement relationships that allow that exchange and other cooperation between people. It first establishes just why this is necessary, with a thorough methodological critique of the way Macroeconomics is done right now. It then presents computational models of two presumably competing kinds of enforcement relationship. The first of these is the third party supervision that we are most familiar with as enforcement from every day life, and which has received some of the longest running philosophical discussion. This hierarchical model reproduces economic fluctuations, through occasional collapses of large parts of the hierarchy. To assess the scientific merit of this model on the terms of conventional Macroeconomics, I develop a compatible hypothesis testing strategy. The second kind of enforcement considered is what would commonly be called peer pressure. For this I derive a preliminary result, that would allow further development of an overarching research program.