UNIVERSITY OF ECONOMICS INSTITUTE OF SOCIAL STUDIES HO CHI MINH CITY THE HAGUE VIETNAM THE NETHERLANDS VIETNAM- NETHERLANDS PROGRAMME FOR M.A IN DEVELOPMENT ECONOMICS Determinants of currency crises in emerging economies in 1996-2005: An Early Warning System approach A thesis submitted in partial fulfillment of the requirements for the degree of Master of Arts in Development Economics By'. , Trtrang Hong Tuan • BQ GIAO DVC FJAO TAO TRUONG fJ~f HQC KINH TE TP.HCM THliVIEN • Thesis supervisor: Dr. Vii Thanh Ttr• Anh r-~1 Ho Chi Minh city, October 2009 TIEU LUAN MOI download : skknchat@gmail.com Certification I declare that the thesis hereby submitted for the Master degree at the Vietnam-Netherlands Programme for M.A in Development Economics is my own work and has not been previously submitted by me at another university for any degree. I cede copyright of the thesis in favor of the Vietnam- Netherlands project for M.A programme in Development Economics.
Ho Chi Minh City, October 2009 Truong H6ng TuAn. Page 2 of 52 TIEU LUAN MOI download : skknchat@gmail.com Abstract Theories of currency crisis consisted of 4 generations of models suggest that economic and institutional variables can be employed in early warning system models to predict currency crisis for the purpose of prevention policy. This study incorporates 5 variables from Berg and Pattillo (1999b) model (Real exchange rate overvaluation, Foreign reserves loss, Export growth, Current account deficit, Short-term external debt/Foreign reserves) and additional Domestic credit growth, 6 institutional variables adopted from Worldwide Governance Indicators (Kaumann et al., 2008) (Voice and Accountability, Political Stability and Absence of Violence, Government Effectiveness, Regulatory Quality, Rule of Law, Control of Corruption) into a simple logit model with dataset of 15 emerging market economies in the period 1996:01-2005:09. The new finding is the high statistical significance of the variable 'Voice and Accountability' (represents freedom of speech, free media and ability to participate in selecting government of a country citizen) on reducing probability of currency crisis.
'Regulatory Quality' (measures government ability to implement efficient policies promoting private sector development) also shows its statistical significance at a lower level in the model. This study also reconfirms other studies that Domestic credit growth and Current account deficit precede currency crisis. Page 3 of 52 TIEU LUAN MOI download : skknchat@gmail.com TABLE OF CONTENTS Certification 2 Abstract 3 Table of Contents 4 Chapter 1 Introduction 5 Chapter 2 Theories of currency crises - A brief review of the literature 7 Chapter 3 Typical early warning systems and empirical currency crisis models - A brief review of the literature 18 Chapter 4 Methodological issues - Empirical framework 27 Chapter 5 Empirical results 36 Chapter 6 Policy implications and conclusion 40 Notes 42 References 42 Appendix 1 Specification of 05 empirical currency crisis models 45 , Appendix 2 Logit regression results by Eviews (Probability of currency crisis) 47 Appendix 3 Robustness test of the result by running logit regression on regions 50 Page 4 of 52 TIEU LUAN MOI download : skknchat@gmail.com Chapter 1 Introduction 1.1 Statement of the Problem On the way to development, currency crises are very costly for emerging economies. Currency crises can lead to banking crises, loss of GDP, high unemployment rate and loss of development momentum.
In the Asian crisis in 1997-98, Thailand lost 10.5% of GDP, Indonesia 13. In May 2008, Morgan Stanley issued a report on Vietnam named "Beyond the tipping point", comparing Vietnam then with Thailand in 1997 and warning a 38% -55% depreciation of VND against USD in the next 12 months. In June 2008, State bank of Vietnam widened trading band for foreign exchange (USD) from 1% to 2%. In November 2008, it raised the band to 3% and in March 2009 to 5%.
Domestic credit growth rate is 50% in 2007, 34% in 2008 and estimated 30% in 2009 by Economist Intelligence Unit. After the booming in stock and real estate market in 2007 with capital inflow mainly for portfolio investment, a crash of more than 70% in stock market broke out in 2008 against its peak in October 2007. Capital inflow and export shrink, larger current account deficit (13.6% in 2008) is putting pressure on the peg regime of VND to USD. It seems that the scenario of Asian crisis repeats in Vietnam.
Unlike Asian crisis countries of crony capitalism, Vietnam's relationship-based system has even weaker institutions. So do institutions play any role in setting stage for a currency crisis? Now is October 2009. Fortunately, the Morgan Stanley's forecast failed, but whether the Vietnam currency crisis is coming soon? Thus, currency crisis is a burning issue in Vietnam for the time being.2 Objective of the Research Page 5 of 52 TIEU LUAN MOI download : skknchat@gmail.com Vietnam is an emerging market economy. Understanding what caused currency crises in other emerging market economies in recent years would be a good reference for further comprehensive researches on what Vietnam should do to prevent its own currency crisis.3 Research Questions This study aims to answer the following questions: 1.
What are the key determinants of currency crises in emerging economies in the period 1996-2005 in the light of early warning system approach? (especially, current account deficit, domestic credit growth and institutional factors) 2. What are the policy implications to prevent a currency crisis? 1.4 Research Methodology Based on theories, empirical models of currency crises and available variables/data, regression with logit model is carried out to recognize the determinants of currency crisis. The statistic software Eview 4.1 is employed in this study.5 Scope of the Research Based on availability of data of institutions and review of recent history of currency crises in emerging market economies, 15 economies are selected and the period of study is limited in 1996-2005. 15 economies are: Argentina, Brazil, Colombia, Czech, Ecuador, India, Indonesia, Korea, Malaysia, Philippines, Russia, Slovakia, South Africa, Thailand and Turkey.6 Organization of the Research The first chapter of this study hereby presents introduction of the issue.
The second chapter will look through theories of currency crisis. The third introduces some typical early warning systems (EWS) and empirical currency crisis models employed at IMF, Goldman Sachs and in a few academic studies. The fourth mentions methodology for designing a EWS model including variables of domestic credit growth and institutions. The fifth represents merits of the focused variables in the model and the sixth delivers policy implications and concludes.
Page 6 of 52 TIEU LUAN MOI download : skknchat@gmail.com Chapter 2 Theories of currency crises - A brief review of the literature In the literature of financial crises, there are banking crises, (sovereign) debt crisis and currency crises. Banking crises are recognized as the insolvency of the banking system that occurs with high ratio of non-performing loan to assets. Demirguc-Kunt and Detragiache (1997) considered one of event or combination of the following as banking crisis: (1) nonperforming assets/total assets ratio in the banking system exceeds 10%; (2) the cost of rescue at least 2% of GDP; (3) large scale nationalization of banks; and (4) extensive bank runs or other emergency measures executed by the government. Debt crisis is defined as a national government fails to meet a principal or interest payment on the due date (Reinhart and Rogoff, 2008).
This study focuses on currency crises only. This chapter consists of 2 parts. Part 1 presents the identification of a currency crisis, part 2 reviews 4 generations of currency crisis models. What cause a currency crisis? It is an exciting question since the collapse to the Breton Wood system.
Especially, the heavy costs of currency crisis in Mexico, Asia, Russia, Argentina. provoke attention of several economists.1 Identifying currency crises An abrupt drop in a country currency value is regarded as currency crisis. It is called 'crisis' because it bring about negative economic effects. They includes shrink in GDP, investment and job loss, banking and business failures, inflation.
Currency crisis can be brought about by currency speculators or government action, or a mix of both. The ideal way to define a currency crisis is as Bussiere and Fratzscher (2002) that incorporate moves in exchange rate, interest rate and foreign reserves (initially set out by Girton and Roper, 1977). They identified a crisis as the exchange market pressure (EMP) of a specific country exceeds its mean by 2 standard deviations. EMP is constructed as a weighted average of the change of the real effective exchange rate (RER), the change in the real interest rate (r) and the change in foreign exchange reserves (res).
Real values are considered to avoid different inflation rate across countries. Interest rate is involved in case the central bank defends the domestic currency by increasing its interest rate. Page 7 of 52 TIEU LUAN MOI download : skknchat@gmail.com The EMPi,t for defining a currency crisis for each country i and period t in formula is as follows: _ EM~.r lu-1 mr~z ( resi.}_,• The weights ffiRER, ffir and ffires are computed as the inverse of the variance of each variable for itself so as to give a larger weight to the variables with less volatility. Due to lack of data, most of the cases currency crisis is defined with changes in exchange rate and foreign reserves only like Kaminsky et al.
( 1998) (KLR) with a little bit difference in the threshold of number of standard deviations. KLR model recognized a crisis as EMP goes beyond its mean by 3 standard deviations. In another simple way, Frankel and Rose (1996) defined a currency crisis as a depreciation of the nominal exchange rate by at least 25% that also exceeds the previous year's depreciation by at least 10%. Thus, they did not consider speculative attacks failed by government intervention via selling foreign reserves as a currency crisis.
The theories of currency crisis have developed over the time. It seems that after a series of currency crises occurred, a new-generation crisis model emerges. A brief review of currency crisis literature can trace out 4 generations of currency crisis model.2 Four generations of currency crisis models The first generation crisis models The first generation crisis model is firstly presented by Krugman (1979). In a small open economy, government would defend the fixed exchange rate regime with limited foreign reserves.
Perfect foresight private investors hold asset portfolio in two kinds of assets: domestic and foreign currency. In an attempt to maintain the fixed rate, government has to sell out reserves until it is exhausted. Government finances its budget deficit by printing money that increases money supply. Page 8 of 52 TIEU LUAN MOI download : skknchat@gmail.com The model derives that as long as there is budget deficit and inflation, investors change the composition of their asset portfolio by increasing the proportion of foreign exchange, reducing the proportion of domestic currency.
Government has to run down its reserves to retain the fixed rate on the way to finance its budget deficit. Exhaustion of reserves pushes government to abandon the pegging. Such expectation makes investors advance the date of their speculative attacks, the leading speculators sell domestic money even earlier and so on, reserves run out faster and currency crisis breaks out. The model seems to have highly simplified assumptions on two asset portfolio holding, the tools government uses to intervene in foreign exchange market, only selling reserves, perfect foresight speculators, the time of crisis is unclearly identified.
Flood and Garber (1984) refined Krugman (1979) model by developing it into 2 models. The first one is a perfect-foresight, continuous-time model that relaxes two-asset portfolio to 4- asset portfolio (included domestic and foreign bond) and adding domestic credit into the model. They found out the exact timing of the peg collapse, and timing has a positive relationship with the size of reserves and a negative one with the domestic credit growth rate. The first model also shows that currency crisis can emerge under arbitrary speculative behavior of investors but they assumed that this effect is zero for simplifying analysis.