Abstract Most of literature and studies on prediction of exchange rate focus on main industrial countries with few discussions on the exchange rate of the developing countries. For model residual differences can be found in a linear model, so the linear model will adjust to find equilibrium at a fixed speed. However, it is difficult for the linear model to capture the character of dynamic adjustment behavior if a non-linear adjustment relationship exists (Sarno, 2002). Moreover, in case the trading costs exist in the foreign exchange market or the technical analysis is widely used among traders, then the deviations from equilibrium exchange rate may present a non-linear adjustment trend. In view of this, this study employed the STAR (smooth transition autoregression) model developed by Granger and Terasvirta (1993) to discuss the dynamic adjustment process of the deviations from UIP in the seven countries in Latin America. In most of the experimental studies conducted in the past, it was found difficult to establish the assumptions of uncovered interest parity (UIP). Therefore, this study is aimed to verify the experimental studies on UIP in the Latin America under the non-linear framework by means of non-linear model analysis.

High interest rate currencies tend to appreciate despite what is be implied by the uncovered interest parity. It is thought that the uncovered interest parity does not hold due to various risks, costs, liquidity issues, and monetary policies. There have been extensive studies into the cause of this phenomenon yet none have examined the period before the formation of the Federal Reserve in 1913. This study examines whether or not the uncovered interest parity holds between the UK, the US, France, Germany, the Netherlands, Belgium, Italy, Spain, and Portugal during this time period to determine if the absence of capital controls and monetary policies allow for the uncovered interest parity to hold. In the end, none of the 213 regressions testing all the country pairs across varying horizons came close to providing support for the uncovered interest parity.

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Thesis advisor: Peter Ireland / Thesis advisor: Rosen Valchev / This dissertation consists in three chapters, each making a distinct contribution. Chapter 1 empirically tests classic and new Uncovered Interest Parity puzzle in an innovative way. Findings suggest that government debt is significant and economically relevant for UIP puzzles estimation.Chapter 2 shows that a class of macroeconomic models reproduce the UIP puzzle under a standard parametrization and adding convenience yields exogenous dynamics. Chapter 3 is a theoretical model that links financial crises to the election of populists parties, matching empirical evidence from Europe. / Thesis (PhD) — Boston College, 2021. / Submitted to: Boston College. Graduate School of Arts and Sciences. / Discipline: Economics.

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A large literature has related the failure of interest rate parity in the foreign exchange market to the existence of a time-varying risk premium. Nevertheless, most modern open economy DSGE models imply a (near) perfect interest rate parity condition. This paper presents a stylized two-country incomplete-markets model in which countries have strong precautionary motives because they face international liquidity constraints, the presence of which successfully generates a time-varying risk premium: the country that has accumulated debt after experiencing relative worse times has stronger precautionary motives and its asset carries a risk premium. (author's abstract) / Series: Department of Economics Working Paper Series

Endovascular aortic repair (EVAR) is a minimally invasive alternative to open surgery for the treatment of aortic aneurysms (AA). However, standard EVAR is not applicable to complex AA with involvement of vital branches, which could be occluded by the endograft. As an emerging technique, the concept of multiple overlapping uncovered stents (MOUS) have been proposed to manage complex lesions. MOUS was used to modulate the flow pattern inside the aneurysm sac, and promote the thrombus formation followed by the aneurysm shrinkage. In this dissertation, we sought to investigate the mechanism of MOUS-induced flow modulation and key factors associated with the success of this novel technique: - The mechanical behaviour of AA was characterised by uniaxial material tests (Chapter 4). A Bayesian framework was proposed for material constants identification. They were found correlated to the microstructure of tissue fibre network and were capable in differentiating tissue types. - Solid-to-solid interaction and one-way fluid-solid interaction (FSI) analysis was performed based on patient-specific computer tomography angiography (Chapters 5&6). Structural stress concentrations were observed within the landing zones, which increased with the number of stents deployed. In the parameter studies (Chapter 6), the overall porosity was identified as the dominant factor of the flow-diverting outcome, while cross-stent structures of MOUS had limited influence. - The pathological effect of structural stress concentration induced by an implanted device was further studied in rabbit models (Chapter 7). The wall structural stress and fluid shear stress were obtained from FSI analysis based on magnetic resonance imaging (MRI), and correlated to plaque characteristics. Both high structural stress and low fluid shear stress were found correlated to plaque initialisation and increased inflammation. Overall, MOUS modulates the blood flow with robust performance under different overlapping patterns. Image-based biomechanical analysis can optimise MOUS design and can contribute to personalised pre-surgery planning.

<p>Essay 1 - To evaluate measures of expectations I examine and compare some of the most common methods for capturing expectations: the futures method which utilizes financial market prices, the VAR forecast method, and the survey method. I study average expectations on the Federal funds rate target, and the main findings can be summarized as follows: i) the survey measure and the futures measure are highly correlated; the correlation coefficient is 0.81 which indicates that the measures capture the same phenomenon, ii) the survey measure consistently overestimates the realized changes in the interest rate, iii) the VAR forecast method shows little resemblance with the other methods.</p><p>Essay 2 - This paper takes a critical look at available proxies of uncertainty. Two questions are addressed: (i) How do we evaluate these proxies given that subjective uncertainty is inherently unobservable? (ii) Is there such a thing as a general macroeconomic uncertainty? Using correlations, some narrative evidence and a factor analysis, we find that disagreement and stock market volatility proxies seem to be valid measures of uncertainty whereas probability forecast measures are not. This result is reinforced when we use our proxies in standard macroeconomic applications where uncertainty is supposed to be of importance. Uncertainty is positively correlated with the absolute value of the GDP-gap.</p><p>Essay 3 - The co-movements of exchange rates and interest rates as the economy responds to shocks is a potential source of deviations from uncovered interest rate parity. This paper investigates whether an open economy macro model with endogenous monetary policy is capable of explaining the exchange rate risk premium puzzle. When the central bank is engaged in interest rate smoothing, a negative relationship between exchange rate changes and interest differentials emerge for realistic parameter values without assuming an extremely large and variable risk premium as done in previous studies.</p><p>Essay 4 - This paper shows how market expectations as a function of the forecasting horizon can be constructed and used to analyse issues like how far in advance monetary policy actions are anticipated and how the market’s understanding of monetary policy has developed over time. On average about half of a monetary policy action is anticipated one month before a policy meeting. The share of fully anticipated FOMC policy decisions increase from less than 10% at the two-month horizon, to about 70% at the one-day horizon. The market ability to predict policy has improved substantially after 1999 as the fraction of fully anticipated meetings has quadrupled at the monthly horizon. This improvement can be described as an effect of increased central bank transparency.</p>

Essay 1 - To evaluate measures of expectations I examine and compare some of the most common methods for capturing expectations: the futures method which utilizes financial market prices, the VAR forecast method, and the survey method. I study average expectations on the Federal funds rate target, and the main findings can be summarized as follows: i) the survey measure and the futures measure are highly correlated; the correlation coefficient is 0.81 which indicates that the measures capture the same phenomenon, ii) the survey measure consistently overestimates the realized changes in the interest rate, iii) the VAR forecast method shows little resemblance with the other methods. Essay 2 - This paper takes a critical look at available proxies of uncertainty. Two questions are addressed: (i) How do we evaluate these proxies given that subjective uncertainty is inherently unobservable? (ii) Is there such a thing as a general macroeconomic uncertainty? Using correlations, some narrative evidence and a factor analysis, we find that disagreement and stock market volatility proxies seem to be valid measures of uncertainty whereas probability forecast measures are not. This result is reinforced when we use our proxies in standard macroeconomic applications where uncertainty is supposed to be of importance. Uncertainty is positively correlated with the absolute value of the GDP-gap. Essay 3 - The co-movements of exchange rates and interest rates as the economy responds to shocks is a potential source of deviations from uncovered interest rate parity. This paper investigates whether an open economy macro model with endogenous monetary policy is capable of explaining the exchange rate risk premium puzzle. When the central bank is engaged in interest rate smoothing, a negative relationship between exchange rate changes and interest differentials emerge for realistic parameter values without assuming an extremely large and variable risk premium as done in previous studies. Essay 4 - This paper shows how market expectations as a function of the forecasting horizon can be constructed and used to analyse issues like how far in advance monetary policy actions are anticipated and how the market’s understanding of monetary policy has developed over time. On average about half of a monetary policy action is anticipated one month before a policy meeting. The share of fully anticipated FOMC policy decisions increase from less than 10% at the two-month horizon, to about 70% at the one-day horizon. The market ability to predict policy has improved substantially after 1999 as the fraction of fully anticipated meetings has quadrupled at the monthly horizon. This improvement can be described as an effect of increased central bank transparency.

This paper aims to explain the current account imbalances between the United States of America, Japan and China. According to theory, such imbalances should offset each other so that the international balance of payments account is zero. The study also tests the Uncovered Interest Rate Parity (UIP) theory for the same sample of countries. The focus is on the empirics of the topic, therefore time-series analysis is used. The results suggest that American current account deficit can indeed be explained by the surpluses of the Japanese and Chinese current accounts. Furthermore, the conclusion regarding the UIP is that it simply does not hold in the real world. Finally, the main implication of this study is that the Asian countries will eventually buy up American assets if the trend of imbalances continues.