Value-at-Risk in the Presence of Structural Breaks Using Unbiased Extreme Value Volatility Estimator

Journal of Quantitative Economics - We provide a framework based on the unbiased extreme value volatility estimator to predict long and short position value-at-risk (VaR). The given framework...     

Long Range Dependence in the Indian Stock Market: Evidence of Fractional Integration,Non-Linearities and Breaks

This paper deals with the analysis of the Indian stock market prices using long range dependence techniques. In particular, we employ a variety of fractionally integrated models, which are very general in the sense that it allows us to incorporate structural breaks and non-linear structures. Our results indicate that the series corresponding to the NSE index is nonstationary and highly persistent, with an order of integration close to or above 1. The volatility, measured in terms of the squared returns indicates that the series is long memory, with an order of integration in the interval (0, 0.5). The results finally support the existence of a mean shift in the data at about January 2008, with the order of integration being around 1. Thus the Efficient Market Hypothesis (EMH) may be satisfied in the Indian stock market once a break is taken into account. However, the existence of short run dynamics suggests a degree of predictability in its behaviour.

     

Structural Breaks and Convergence in the Regions of Peru: 1970–2010

The aim of this paper is the analysis of stochastic and β‐convergence in the relative regional per capita outputs using different unit root tests both with and without structural breaks and using a further test that is robust to the presence of I(0) or I(1) errors. It allows robust inference on the estimates of the initial per capita output (intercepts) and the respective growth rates (slopes). The results of the application of unit root tests without structural breaks show the absence of stochastic convergence. However, by incorporating the presence of endogenous breaks, the results are reversed for all regions. In the case of β‐convergence, the results of the robust test W_RQF show that all regions have a structural break at some point during the period 1970–2010. We find different behavior for different regions. There is a catching‐up process and a lagging‐behind process for different groups of regions towards more negative or more positive paths.     

基于结构突变理论的我国货币流通速度的长期趋势

本文利用结构突变理论,对我国狭义、广义货币流通速度的数据生成过程进行了实证研究,结果表明:改革开放以来,我国狭义、广义货币流通速度服从于单位根过程,数据生成过程并未发生结构突变,因而基本保持了持续下降的"稳定态势".     

On the Instability of Tunisian Money Demand: Some Empirical Issues with Structural Breaks

This paper focuses on the causes of instability of money demand in Tunisia between 1973 and 2013. It has been argued that the main explanatory factors of money demand are national income, monetary market rate and exchange rate. We tested Ambler and McKinnon hypothesis (1985), which assumes that instability is explained by the absence of the nominal exchange rate in the specification of money demand. We found that structural changes are explained by the dependence of the national economy to world shocks, the IMF’s structural adjustment programme at the end of 1986.

     

Cities, Workers, and Wages: A Structural Analysis of the Urban Wage Premium

Workers earn higher wages in cities vs. rural areas. This gap could arise because cities make workers more productive, or it could be the result of a non-random selection of workers into cities based on their ability and their endogenous history of career choices. To untangle these issues, this paper estimates a dynamic programming model, which embeds the choice of residing in a city or rural area within a model of career choices over time. After controlling for all the sources of selection and endogeneity, the estimates indicate that a given worker does earn more in the city for white-collar work, but not for blue-collar work. In addition, city work experience is found to be worth more than rural work experience in the rural area for white-collar work, but not for blue-collar work. These results support the interpretation that cities make white-collar workers more productive and suggest that workers may consider moving to the city not only in terms of locational choice, but also as a form of human capital investment.     

A New Test of the Real Interest Rate Parity Hypothesis: Bounds Approach and Structural Breaks

The real interest rate parity hypothesis is tested using data for the group of seven industrialized countries (G7) over the period 1970–2008. The contribution is two‐fold. First, the paper utilizes the bounds approach in order to overcome uncertainty about the order of integration of real interest rates. Second, a test is made for structural breaks in the underlying relationship using a multiple structural breaks test. The results indicate significant parameter instability and suggest that, despite the advances in economic and financial integration, real interest rate parity has not fully recovered from a breakdown in the 1980s.     

Bitcoin市场的长记忆性的实证分析

Bitcoin是一种新型的虚拟电子货币。运用初步的统计方法和R/S分析法分析其市场交易数据,对其长记忆性进行实证分析。分析结果表明,现阶段,Bitcoin的交易市场具有聚集性和持续性,当前的价格对于未来很长一段时间都有影响。     

Purchasing Power Parity By sectors From Selected European Countries: Cointegration and Structural Breaks

In this paper we study the long-run Purchasing Power Parity (PPP) hypothesis by traded and non-traded sectors using cointegration techniques in the presence of structural breaks, for a set of European countries during the period 1975:1-1995:12. This approach is complementary to many existing approaches to investigate the PPP Hypothesis. We find evidence in favor of long-run PPP hypothesis when commodity prices and used in the presence of structural breaks. This result lends support to the integration process in the European Union. [C22, F30]     

The Risk Premium, Exchange Rate Expectations, and the Forward Exchange Rate: Estimates for the Yen–Dollar Rate

The hypothesis that the forward rate is an unbiased predictor of the future spot rate has been rejected in many empirical studies. The rejection of this hypothesis could occur because market behavior is inconsistent with rational–expectations or because there exists a risk premium. Equations describing the forward premium and the change in the exchange rate are estimated jointly, and tests of both the rational–expectations and no–risk–premium hypotheses are conducted. Empirical estimates, obtained using quarterly data for the yen–dollar exchange rate, reject the rational–expectations hypothesis and suggest that there exists a time–varying risk premium.     

Unemployment and Welfare Participation in a Structural VAR: Rethinking the 1990s in the United States

A report by the Council of Economic Advisers (1997 Council of Economic Advisers. May 1997. “Explaining the decline in welfare receipt, 1993–1996”. May, Washington, DC Executive Office of the President [Google Scholar]) is the first of a group of studies, known as caseload studies, analysing the relationship between the US unemployment rate and the welfare participation rate, with special regard to the 1990s. We examine this relationship in a structural VAR model over the period of 1960–2000 and find that the unemployment rate does not help to predict the welfare participation rate while the converse is more likely to hold. These results are robust to state and year heterogeneity over a period of unprecedented positive correlation between unemployment and welfare participation, i.e. 1990–1998. Further, we find that a shock to the welfare participation rate has a contemporaneous impact on the unemployment rate while the converse is less likely to hold. The main conclusion is that several caseload studies may be based on the wrong assumption that the unemployment rate is an exogenous explanatory variable of the welfare participation rate.     

Structural Breaks and the Equilibrium Chinese Yuan/US Dollar Real Exchange Rate: A FEER Approach

This paper examines the equilibrium Chinese yuan/US dollar (CNY/USD) real exchange rate within the framework of the fundamental equilibrium exchange rate (FEER) model. Endogenous structural breaks are allowed for in all cointegration relationships. Macroeconomic fundamentals that affect medium‐term savings and investment and hence, the sustainable current account, are also highlighted. A unique set of quarterly data for the post‐reform period (1982–2009) is constructed. This paper finds structural breaks in all trade and the sustainable current account equations. The misalignment rates show that the real exchange rate was overvalued in most years until 2003, followed by undervaluation during 2004–09. However, the average misalignment rates and revaluation required to correct this undervaluation are not as large as suggested by previous studies, with the undervaluation rate declining sharply in 2009. Further, misalignment rates are computed using a sustainable current account of 3%. The findings suggest such exogenous input leads to results biased towards larger undervaluation.     

Structural Breaks,Biased Estimations,and Forecast Errors in a GDP Series of Canada versus the United States

International Advances in Economic Research - A structural break was suspected for the Canadian gross domestic product (GDP) time series when the reporting system switched from the Standard...     

预算软约束、融资溢价与杠杆率——供给侧结构性改革的微观机理与经济效应研究

本文针对我国部分企业中存在的预算软约束问题及其造成价格扭曲、资源错配的现实背景,在金融加速器理论的基础上,首先建立嵌入预算软约束的金融加速器机制,通过企业与金融机构债务契约优化问题,得到预算软约束企业的融资溢价方程,阐述预算软约束造成价格扭曲及资源错配的内生机理。然后构建动态随机一般均衡模型,阐释供给侧结构性改革"三去一降一补"五大任务对经济变量的具体影响,并通过参数调整揭示供给侧结构性改革削弱预算软约束,增强宏观调控政策有效性以及促进长期经济增长的微观机理和经济效应,进而为推进供给侧结构性改革和经济长期可持续发展提供理论依据和政策建议。     

Expectations and the Black Market Premium

The purpose of this paper is to gain a better understanding of the black market premium—the percentage differential between the black market and the official exchange rate. Tests are used to see whether the black market premium responds to variations in expectations about the official exchange rate in Argentina, Brazil, Colombia, and Mexico. Expectations of devaluation do cause movements in the black market premium for Argentina, Brazil, and Mexico but this behavior is not observed for Colombia. Colombian economic agents seem less sensitive to expected returns. This perhaps explains the relatively flat black market premium series observed for Colombia.     

Breaks in the chain of comparative advantage

The chain proposition of comparative advantage states that when factor prices differ between two countries producing many products with two factors, every export of the capital abundant country would be more capital intensive than any of its imports. The present note points out that an economy has the option to break the chain to reach full employment if its factor endowment is not spanned by the production cone of the more intensive products.     

Trade Balance and Exchange Rate: Unit Roots, Co-integration and Long Memory in the US and the UK

This paper deals with the relationship between the balance of trade and the exchange rate in the US/UK case. Many authors have studied this issue for many countries, but despite the intensive research, there is still no agreement about the effectiveness of currency devaluation to increase a country's balance of trade. We first analyse the relationship between the two variables using unit roots and co-integration methods, and the results are ambiguous. We try a new approach based on fractional integration. The unit root hypothesis is rejected in case of the trade balance in favour of smaller orders of integration, while this hypothesis is not rejected for the exchange rate. Thus, the two series do not possess the same order of integration. We sort this problem out by taking the exchange rate as an exogenous variable, and including it in a regression model where the residuals might follow a fractionally integrated model.     

Learning for Innovation and the Skill Premium

The computer revolution took very long to pay off in productivity growth in the computer-using sectors. The relative wage of skilled workers, however, has risen sharply from the early days of the computer revolution onward. As skilled workers wages reflect their productivity, the two observations together pose a puzzle.This paper provides a micro-based explanation for the long diffusion period of the computer revolution. The general equilibrium model of growth zooms in on the research process and provides an explanation for sluggish growth with booming relative wages of the skilled. Technological progress in firms is driven by research aimed at improving the production technology (innovation) and by assimilation of ideas or principles present outside the firm (learning). A new General Purpose Technology (GPT) like the computer revolution generates an initial slowdown in economic growth and an increase in the skill premium.Acknowledgement I am indebted to Theo van de Klundert for suggestions and encouragement. Suggestions by Jan Boone, Bas Jacobs, Patrick Francois, Henri de Groot, Lex Meijdam, Niek Nahuis Sjak Smulders, Harald Uhlig and anonymous referees have contributed to the paper.     

Estimation and Forecasting in Models with Multiple Breaks

This paper develops a new approach to change-point modelling that allows the number of change-points in the observed sample to be unknown. The model we develop assumes that regime durations have a Poisson distribution. It approximately nests the two most common approaches: the time-varying parameter (TVP) model with a change-point every period and the change-point model with a small number of regimes. We focus considerable attention on the construction of reasonable hierarchical priors both for regime durations and for the parameters that characterize each regime. A Markov chain Monte Carlo posterior sampler is constructed to estimate a version of our model, which allows for change in conditional means and variances. We show how real-time forecasting can be done in an efficient manner using sequential importance sampling. Our techniques are found to work well in an empirical exercise involving U.S. GDP growth and inflation. Empirical results suggest that the number of change-points is larger than previously estimated in these series and the implied model is similar to a TVP (with stochastic volatility) model.     

Foreign Exchange Controls and the Parallel Market Premium

This paper studies the relationship between the official and parallel exchange rates, using cointegration, Granger causality, and reduced form methods on data from three Caribbean countries, Jamaica, Guyana, and Trinidad & Tobago, for the period 1985–93. Where the central bank follows a passive policy of infrequent and large adjustments to the official rate, changes in the official rate Granger causes changes in the parallel rate, and larger disparities prevail between the two rates. Foreign exchange controls, expansionary fiscal and monetary policy, and changes of government mostly have a positive effect on the parallel market premium, with foreign exchange controls exerting the strongest impact.