Macroeconomic factors and equity prices: an empirical
investigation by using ARDL approach.




Article Type:  Report 
Subject: 
Interest rates Foreign investments 
Authors: 
Hasan, Arshad Nasir, Zafar Mueen 
Pub Date:  12/22/2008 
Publication:  Name: Pakistan Development Review Publisher: Pakistan Institute of Development Economics Audience: Academic Format: Magazine/Journal Subject: Business, international; Social sciences Copyright: COPYRIGHT 2008 Reproduced with permission of the Publications Division, Pakistan Institute of Development Economies, Islamabad, Pakistan. ISSN: 00309729 
Issue:  Date: Winter, 2008 Source Volume: 47 Source Issue: 4 
Product:  Product Code: E561000 Interest Rates 


Accession Number:  228122162 
Full Text: 
This study examines the relationship between equity prices and
macroeconomic variables such as inflation, industrial production, oil
prices, short term interest rate, exchange rates, foreign portfolio
investment, and money supply for the period 6/98 to 6/2008 by employing
bounds testing procedure proposed by Pesaran, et al. (2001).
Autoregressive distributed lag (ARDL) approach has been applied as
yields consistent estimates of the longrun coefficients that are
asymptotically normal irrespective of whether the underlying regressors
are I(0) or I(1). Data has been tested for econometric problems like
serial correlation, functional form, normality, heteroscdisticity and
unit root by using LM test, Ramsey Reset test, skewness and kurtosis
test, white test and ADF Test, and Phillip Parren Test respectively but
no problem has been observed. Results of the study reveal that
industrial production, oil prices and inflation are not statistically
significant in determining equity prices in long run while interest
rates, exchange rates and money supply have significant long run effect
on equity prices. The error correction model (ECM) based upon ARDL
approach confirms that changes in industrial production, oil prices and
inflation are not statistically significantly in short run while changes
in interest rates, exchange rates, and money supply have significant
short term effect. However, foreign portfolio investment has significant
short term effect but no long term effect. The tests suggest that
adjustment process is quite fast and model is structurally stable. This
study facilitates the investors in taking effective investment decisions
by estimating the future direction of equity prices using expected
trends in exchange rates, money supply and interest rate. Similarly,
study suggest to the architects of monetary policy to be careful in
revision of interest rates as capital market responds negatively to such
decisions. The study also suggest that macroeconomic policies should be
designed keeping in view the response of the capital market because
efficient market hypothesis indicates that capital markets respond to
new information. JEL classification: E31,G12 Keywords: Macroeconomic Variables, Multifactor Model, Pakistan, ARDL, Error Correction Model INTRODUCTION The relationship between macroeconomic variables and the equity prices has attracted the curiosity of academicians and practitioners since the publication of seminal paper of Chen, et al. (1986). Many empirical studies those tested the relationship reveal that asset pricing theories do not properly identify macroeconomic factors that influence equity prices [Roll and Ross (1980); Fama (1981); Chen, et al. (1986); Hamao (1986); Faff (1988); Chen (1991); Maysami and Koh (2000) and Paul and Mallik (2001)]. In most of these studies, variable selection and empirical analyses is based on economic rationale, financial theory and investors' intuition. These studies generally apply Eagle and Granger (1987) procedure or Johanson and Jusilieus (1990, 1991) approach in Vector Auto Regressor (VAR) Framework. In Pakistan, Fazal (2006) and Nishat (2001) explored the relationship between macroeconomic factors and equity prices by using Johanson and Jusilieus (1990, 1991) procedure. The present study tests the relationship between macroeconomic variables such as inflation, industrial production, oil prices, short term interest rate, exchange rates, foreign portfolio investment, money supply and equity prices by using Auto Regressive Distributive Lag (ARDL) bounds testing procedure proposed by Pesaran, Shin, and Smith (1996, 2001). The ARDL approach in an errorcorrection setting has been widely applied to examine the impact of macroeconomic factors on economic growth but it is strongly underutilised in the capital market filament of literature. This methodology has a number of advantages over the other models. First, determining the order of integration of macroeconomic factors and equity market returns is not an important issue here because the Pesaran ARDL approach yields consistent estimates of the longrun coefficients that are asymptotically normal irrespective of whether the underlying regressors are I(0) or I(1) and of the extent of cointegration. Secondly, the ARDL approach allows exploring correct dynamic structure while many econometric procedures do not allow to clearly distinguish between long run and short run relationships. In Pakistan, only Akmal (2007) investigated the relationship between stock returns and inflation for the Pakistani equity market by employing ARDL approach. The study covered the period from 19602006. The unique aspect of the present study is that it first time explores the relationship among equity prices and a broader portfolio of macroeconomic variables by using a powerful ARDL Approach and offers greater insight from a new dimension. The set of macroeconomic variables includes industrial production index, consumer price index, money supply, exchange rate, foreign portfolio investment, treasury bill rates and oil prices. Karachi stock exchange index has been used as proxy for equity market prices covering the period from June 1998 to June 2008. The paper is organised as follows. Section II summarises some recent literature on the subject. The data and mathematical model are discussed in Section III. Empirical results and discussion is provided in Section IV while main finding and policy implications are discussed in Section V. REVIEW OF LITERATURE The relationship between equity market returns and economic fundamentals has been extensively investigated in developed markets e.g. Chen, et al. (1986), Fama (1990), Chen (1991), Cheung and Ng (1998), Choi, et al. (1999), Dickinson (2000), Nasseh and Strauss (2000). Chen, Roll, and Ross (1986) investigate the existence of long run relationship among equity prices and industrial production, inflation, risk premium, market return, oil prices, term structure and consumption for US. Industrial production, risk premium, yield curve, and unanticipated inflation were found to be explaining expected returns during periods of high volatility while oil prices, market index, and consumption had no significant role in explaining the equity priced. Other studies exploring the relationship between industrial production and equity market returns found mixed results [Chan, Chen, and Hsieh (1985); Chen, Roll, and Ross (1986); Burnmeister and Wall (1986); Beenstock and Chan (1988); Chang and Pinegar (1990); Kryzanowski and Zhang (1992); Chen and Jordan (1993); Sauer (1994); Rahman, Coggin, and Lee (1998)]. A number of studies explore the relationship between inflation and equity market returns and found mixed results [Chan, Chen, and Hsieh (1985); Chen, Roll, and Ross (1986); Burnmeister and Wall (1986); Burmeister and MacElroy (1988); Chang and Pinegar (1990); Defina (1991); Kryzanowski and Zhang (1992); Chen and Jordan (1993); Sauer(1994); Rahman, Coggin, and Lee (1998) and Mark (2001)]. A study by Kessal (1956) concludes that unexpected inflation increases the firm's equity value if the firm is net debtor. A few other studies also find positive relationship between inflation and equity prices [Firth (1979); Gultekin (1983); Boudhouch and Richarson (1993)]. More recently, a study by Ioannidis, et al. (2004) using Greece data for the period 19852003, finds the evidence of positive relationship between inflation and equity market returns. In contrast, a study by Fama (1981) finds a negative association between equity market returns and inflation. The results were supported by Spyrou (2001) and Amidhud (1996). Similarly, Beenstock and Chan (1988), Sauer (1994) explore the relationship among money supply and equity market returns. In case of developing countries few studies were found exploring the relationship between equity prices and macroeconomic variables. Shahid (2008) explores causal relationships among equity prices and industrial production, money supply, exports, exchange rate, foreign direct investment and interest rates on Indian data for the period 3/95 to 3/2007 by employing cointegration analysis and Toda and Yamamoto Granger causality test on quarterly data. Short run relationships among variables have also been investigated by using Bivariate Vector Autoregressive Model for variance decomposition and impulse response functions. The study concludes that equity prices lead to economic activity in India in general. However, interest rate is found to lead the equity prices. By using Pakistani data, Fazal and Mahmood (2001) explore the causal relationship between equity prices and macroeconomic variables i.e. economic activity, investment spending, and consumption expenditure. They apply cointegration analysis and VECM on the data for the period 7/1959 to 6/1999. The study finds the existence of long run relationship between equity prices and macroeconomic variables of the study. Unidirectional causality has been found flowing from macro variables to equity prices. The study, however could not find the influence of equity prices on aggregate demand. In another study, Fazal (2006) again examined the relationship by considering the shifts as a result of economic liberalisation. He finds a unidirectional causality between the real sector and equity prices and could not observe significant change in the patterns. The relationship between equity prices and inflation has been investigated by Akmal (2007) by employing ARDL approach on Pakistani data for the period 19712006. The results indicate that stocks are hedge against inflationary pressures (inflation) in the long run. (1) The survey of the literature shows that although a number of studies investigated the relationship between equity prices and different macroeconomic variables but there is no study that has included broader set of variables in the model for Pakistan. The present study thus fills the gap by including a broader set of macroeconomic variables in the model to explore their relation with equity prices. The other contribution of the study is the use of ARDL model on long term monthly data covering the period from June 1998 to June 2008. DATA DESCRIPTION This study explores the long term causal relationship between Pakistani capital market and macroeconomic variables using monthly data for the period 6/1998 to 6/2008. Similar work is done earlier by Chan and Faff (1998). The set of macroeconomic variables included in this study are Industrial Production Index, Broad Money, Oil Prices, Foreign Exchange Rate, Inflation and Interest Rate. The full description of the variables is explained below. Equity Market Returns It is the dependent variable of the model and calculated by using the following equation; [R.sub.t] = ln ([I.sub.t] / [I.sub.t1]) where: [R.sub.t] is Return for month 't'; and [I.sub.t] and [I.sub.t1] are closing values of KSE 100 Index for month 't' and 't1' respectively. Industrial Production Index (IPI) This independent variable has been used as proxy to measure the growth rate in real sector. Industrial production presents a measure of overall economic activity in the economy and affects stock prices through its influence on expected future cash flows. It is hypothesised that an increase in industrial production is positively related to equity prices. Narrow Money (M1) Narrow Money ([M.sub.1]) is used as a proxy of money supply. Increase in money supply leads to increase in liquidity that ultimately results in upward movement of nominal equity prices. It is therefore hypothesised that an increase in money supply is positively related to equity market returns. Consumer Price Index (CPI) Consumer Price Index is used as a proxy for inflation rate. It is chosen because of its broad base measure to calculate average change in prices of goods and services during a specific period. Inflation is ultimately translated into nominal interest rate and an increase in nominal interest rate increases discount rate which results in reduction of present value of cash flows. An increase in inflation is expected to negatively affect the equity prices. Oil Prices Brent oil prices have been used as proxy for oil prices. Increase in oil prices increases the cost of production and decreases the earning of the corporate sector due to decrease in profit margins or decrease in demand of the product. Oil prices are therefore negatively related to equity prices. Foreign Exchange Rate This study employs foreign exchange rate as end of month US$/Rs exchange rate. It is hypothesised that depreciation in home currency is negatively related to equity prices. T Bill Rate Treasury bill rates have been used as proxy of Interest rate. Increase in interest rate leads to increase in discount rate and it ultimately results in decrease in present value of future cash flows which represent fair intrinsic value of shares. Therefore, it is expected that an increase in interest rate will negatively affect the equity market returns. Foreign Portfolio Investment Foreign portfolio Investment has been used as proxy of Investor's confidence. Foreign portfolio investment increases liquidity in market and higher demand leads to increase in market prices of shares. It is therefore expected that an increase in foreign portfolio investment will positively affect the equity market returns. DATA AND METHODOLOGY Data on monetary variables like Treasury Bill Rates and Exchange Rates, Foreign Portfolio Investment and Money Supply have been collected from various statistical bulletin issued by State Bank of Pakistan. Data on Industrial Production and Consumer Price Index has been collected from statistical bulletins issued by the Federal Bureau of Statistics FBS). The data on stock market (KSE100 indexes) is obtained from daily Business Recorder newspaper which is reliable source of stock market data. The data on Oil prices are taken from EIA website. There are several methods available to test for the existence of longrun equilibrium relationship among timeseries variables. The most widely used methods include Engle and Granger (1987) test, fully modified OLS procedure of Phillips and Hansen's (1990), maximum likelihood based Johansen (1988, 1991) and JohansenJuselius (1990) tests. These methods require that the variables in the system are integrated of order one i.e. I(1). In addition, these methods suffer from low power and do not have good small sample properties. Due to these problems, a newly developed autoregressive distributed lag (ARDL) approach to cointegration has become popular in recent years. This study employs ARDL approach to cointegration following the methodology proposed by Pesaran and Shin (1999). This methodology is chosen as it has certain advantages on other cointegration procedures. For example, it can be applied regardless of the stationary properties of the variables in the sample. Secondly, it allows for inferences on longrun estimates which are not possible under alternative cointegration procedures. Finally, ARDL Model can accommodate greater number of variables in comparison to other Vector Autoregressive (VAR) models. First of all data has been tested for unit root. This testing is necessary to avoid the possibility of spurious regression as Ouattara (2004) reports that bounds test is based on the assumption that the variables are I(0) or I(1) so in the presence of I(2) variables the computed Fstatistics provided by Pesaran, et al. (2001) becomes invalid. Similarly other diagonistic tests are applied to detect serial correlation, heteroscadasticity, conflict to normality. If data is found I(0) or I(1), the ARDL approach to cointegration is applied which consists of three stages. In the first step, the existence of a longrun relationship between the variables is established by testing for the significance of lagged variables in an error correction mechanism regression. Then the first lag of the levels of each variable are added to the equation to create the error correction mechanism equation and a variable addition test is performed by computing an Ftest on the significance of all the lagged variables. The second stage is to estimate the ARDL form of equation where the optimal lag length is chosen according to one of the standard criteria such as the Akaike Information or Schwartz Bayesian. Then the restricted version of the equation is solved for the longrun solution. The following model is used to examine the relationship between equity market returns and macroeconomic factors; [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] Where I = KSE  100 Index Oil = Oil prices in $ XRate = Foreign Exchange Rates $/Rs. TBill = Six Month Treasury Bill Rate CPI = Consumer Price Index FPI = Foreign Portfolio Investment M1 = Narrow Money. An ARDL representation of above equation is as below: [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] Where i ranges from 1 to p The third stage entails the estimation of the error correction equation using the differences of the variables and the lagged longrun solution, and determines the speed of adjustment of returns to equilibrium. A general error correction representation of equation is given below: [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] It is expected that interest rates, inflation and oil prices have negative impact on returns. The coefficients [gamma], [phi] and [eta] are therefore expected to have negative sign i.e. [gamma] < 0, [phi] < 0 and [eta] < 0. As industrial production, foreign portfolio investment and money supply are expected to have a positive effect on equity returns, therefore the coefficients [beta], [gamma], and [zeta] are expected to be positive, i.e. [beta] > 0, [gamma] > 0, [zeta] > 0. Finally, stability of shortrun and longrun coefficients is examined by employing cumulative sum (CUSUM) and cumulative sum of squares (CUSUMSQ) tests. The CUSUM and CUSUMSQ statistics are updated recursively and plotted against the break points. If the plots of CUSUM and CUSUMSQ statistics stay within the critical bonds of 5 percent level of significance, the null hypothesis of all coefficients in the given regression are stable and cannot be rejected. EMPIRICAL RESULTS Table 1 reports the results of unit root test applied to determine the order of integration among time series data. ADF Test and PhillipsPerron Test have been used at level and first difference under assumption of constant and trend. Results clearly indicate that the index series are not stationary at level but the first differences of the logarithmic transformations of the series are stationary. Therefore, it can safely be said that series are integrated of order one I (1). It is worth mentioning that results are robust under assumption of constant trend and no trend. This testing is necessary to avoid the possibility of spurious regression as Ouattara (2004) reports that bounds test is based on the assumption that the variables are I(0) or I(1) so in the presence of I(2) variables the computed Fstatistics provided by Pesaran, et al. (2001) becomes invalid. Now causal relationship among the macroeconomic variables has been studied by employing ARDL approach. Akaike Information Criterion, Schwarz Bayesian Criterion and HannanQuinn, Log Likelihood equation are most common measures to determine the number of lags. Duration of the lag which provides the smallest critical value is identified as the model's duration of lag if no autocorrelation is observed. In this study, maximum duration of lag has been taken as 3. The number of lags which minimise the Schwarz Bayesian Criterion is 2 and LM test confirms that no autocorrelation problem exists at this duration of Lag. Criteria and test values are given in Table 2 (a) and Table 2 (b). Above results indicate that econometric problems like autocorrelation, conflict to normal distribution has not been observed. Similarly, no model specification error exists with reference to functional form. Shrestha (2005) states that presence of heteroscedasticity does not affect the estimates and as time series in the equation are of mixed order of integration so it is natural to detect heteroscadasticity. Table 3 below exhibits results of ARDL Model based on Schwarz Bayesian Criterion. Results reveal that industrial production, oil prices, inflation are not statistically significantly while interest rates, exchange rates, foreign portfolio investment and money supply have significant impact on equity prices. The results of the bounds testing approach for Cointegration show that the calculated Fstatistics is 1949 which is significant at 1 percent level of significance implying that the null hypothesis of no cointegration cannot be accepted and there exists cointegration relationship among the variables in this model. An analysis presented in Table 3 indicates that macroeconomic variables significantly explain equity prices. The value of RBarSquared is 0.99 which indicates a high degree of correlation among variables. FStatistics is also significant at 1 percent which indicates overall goodness of fit. Table 4 displays the long term coefficients under ARDL Approach. Results reveal that industrial production, oil prices, inflation and foreign portfolio investment are statistically insignificant while interest rates, exchange rates and money supply have significant long run effect on equity prices. A statistically significant negative relationship is found between interest rate and equity returns which is logical because increase in interest rates leads to increase in discount rate and it ultimately results in decrease in present value of future cash flows which represents fair intrinsic value of shares. X rate is significantly related to equity prices and as exchange rate is taken as $/PRs so Ln XRate will always be negative so depreciation of home currency is negatively related to equity market prices. Money growth rate is positively related with equity prices that are in line with results drawn by Maysami and Koh (2000). The possible reason is that increase in money supply leads to increase in liquidity that ultimately results in upward movement of nominal equity prices. Error Correction Representation of above long run relationship is reported in Table 5 which captures the shortrun dynamics of relationship among macroeconomic variables and equity prices. The error correction model based upon ARDL approach establishes that changes in industrial production, oil prices and inflation are statistically insignificant while changes in interest rates, exchange rates, foreign portfolio investment and money supply have significant short term effect. [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] According to results, short term elasticities of interest rates, exchange rates and money supply are 0.08, 0.47 and 0.48 respectively. It is worth mentioning that these elasticities are much lower than long run elasticities. It is also observed that foreign portfolio investment is not significant in long term but it is statistically significant in short term. ECM (1) is one period lag value of error terms that are obtained from the longrun relationship. The coefficient of ECM (1) indicates how much of the disequilibrium in the shortrun will be fixed (eliminated) in the longrun. As expected, the error correction variable ECM (1) has been found negative and also statistically significant. The Coefficient of the ECM term suggests that adjustment process is quite fast and 39 percent of the previous year's disequilibrium in equity prices from its equilibrium path will be corrected in the current year. Finally, CUSUM and CUSUMSQ plots are drawn to check the stability of short run and long run coefficients in the ARDL error correction model. Figure 1 shows the cumulative sum of recursive residuals whereas Figure 2 displays the cumulative sum of squares of recursive residuals. [FIGURE 1 OMITTED] [FIGURE 2 OMITTED] CONCLUSION This study examine the relationship among the inflation, industrial production, oil prices, short term interest rate, exchange rates, foreign portfolio investment, money supply and equity prices for the period 6/98 to 6/2008 by using ARDL approach based on bounds testing procedure proposed by Pesaran and Shin (2001). The ARDL approach has been applied as it more powerful procedure to explore the long run relationship as well short term dynamics of relationship and yields consistent estimates of the longrun coefficients that are asymptotically normal, irrespective of whether the underlying regressors are I(0) or I(1). Data has been tested to examine econometric problems like serial correlation, functional form, normality, heteroscdasticity and unit root by using LM test, Ramsey Reset test, skewness and kurtosis test, white test and ADF Test and Phillip Parren Test respectively. Results indicate that econometric problems like autocorrelation, conflict to normal distribution has not been observed. Similarly, no model specification error exists with reference to Functional form. Unit root test clearly indicate that the index series are not stationary at level but the first differences of the logarithmic transformations of the series are stationary. However, white test indicates the presence of heteroscadasticity. Shrestha (2005) states that presence of heteroscedisticity does not affect estimates. In ARDL, we deal with data series which may not be integrated at same level so detection of heteroscedisticity is quite natural. Results of ARDL long run coefficients reveal that industrial production, oil prices and inflation are statistically insignificant in determining equity prices in long run while interest rates, exchange rates and money supply have significant long run effect on equity prices. The error correction model based upon ARDL approach captures the short term dynamics of prices and it also confirms that changes in industrial production, oil prices and inflation are not statistically significant in short run while changes in interest rates, exchange rates, and money supply have significant short term effect. However, foreign portfolio investment has significant short term effect in short term and no long term effect in long term. The error correction variable ECM (1) has been found negative and statistically significant. The Coefficient of the ECM term suggests that adjustment process is quite fast and 39 percent of the previous year's disequilibrium in equity prices from its equilibrium path will be corrected in the current year. The plots of CUSUM and CUSUMSQ are drawn to check the stability of short run and long run coefficients in the ARDL error correction model. These plots show both CUSUM and CUSUMSQ as within the critical bounds of 5 percent which is an indication of the fact that the model is structurally stable. This study facilitates the investors in taking effective investment decisions as by estimating the expected trends in exchange rates, money supply and interest rates, they can estimate the future direction of equity prices and can allocate their resources more efficiently. Efficient market hypothesis provides that capital markets respond to arrival of new information so macroeconomic policies should be designed keeping in view the response of the capital market. Therefore, architects of monetary policy should be careful in revision of interest rates as capital market responds negatively to such decisions. Similarly, State Bank of Pakistan should also consider the impact of money supply on capital markets which has significant relationship with equity returns. REFERENCES Akmal, M. S. (2007) Stock Returns and Inflation: An ARDL Econometric Investigation Utilising Pakistani Data. Pakistan Economic and Social Review 45:1, 89105. Amihud, Y. 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Value 3.4477 3.4480 10% Critic Value 3.1489 3.1491 PPLevel PPIst Diff Ln Kse100 2.0872 12.2821 Ln IPI 2.8182 8.7609 Ln Oil 2.0543 8.2033 Ln X Rate 3.1003 6.4168 Ln T Bill 1.3595 7.8162 Ln CPI 2.6215 8.6190 Ln FPI 0.4640 10.8700 Ln M1 1.9545 10.2284 1% Critic. Value 4.0363 4.0370 5% Critic. Value 3.4477 3.4480 10% Critic Value 3.1489 3.1491 Table 2(a) Statistics for Selecting the Lag Order AIC SBC LL Lag 1 127.2179 114.6742 136.2179 Lag 2 125.6181 113.1121 * 134.6181 Lag 3 128.7087 113.4699 139.7087 Table 2(b) Diagnostic Tests Item Test Applied CHSQ Prob ([chi square]) Serial Correlation Lagrange Multiplier Test 18.74 0.095 Normality Test of Skewness and 2.88 0.236 Kurtosis Functional Form Ramsey's RESET Test 0.59 0.443 Heteroscedisticity White Test 4.68 0.03 Table 3 ARDL (1, 0, 0, 0, 0, 0, 1, 0) Selected based on SBC Regressor Coefficient S. Error T Ratio Prob. Ln INDEX(1) 0.6068 0.0742 8.1819 0.000 Ln IPI 0.0225 0.0388 0.5783 0.564 Ln OIL 0.0481 0.0360 1.3345 0.185 Ln XRATE 0.4675 0.2239 2.0879 0.039 Ln TBILL 0.0797 0.0176 4.5251 0.000 Ln CPI 0.2757 0.3315 0.8316 0.407 Ln FP1 0.7712 0.3376 2.2841 0.024 Ln FPI(1) 0.7401 0.3428 2.1589 0.033 Ln M1 0.4790 0.1037 4.6178 0.000 [R.sup.2] 0.9929 Adj [R.sup.2] 0.9925 AIC 125.61 SBC 113.11 FStatistics 1949 FSignificance 0.000 D.W. Statistics 2.1000 Table 4 Estimated Long Run Coefficients for Selected ARDL Model Regressor Coefficient S. Error T Ratio Prob. LNIPI 0.0572 0.0964 0.5934 0.554 LNOIL 0.1222 0.0829 1.4743 0.143 LNXRATE 1.1891 0.5260 2.2604 0.026 LNTBILL 0.2027 0.0369 5.4946 0.000 LNCPI 0.7012 0.8286 0.8463 0.399 LNFPI 0.0794 0.2713 0.2927 0.770 LNM1 1.2185 0.1704 7.1487 0.000 Table 5 (a) Error Correction Representation for the Selected ARDL Model Reyressor Coefficient S. Error T Ratio Prob. [DELTA]LnIPI 0.2248 0.0389 0.5783 0.564 [DELTA]LnOIL 0.0481 0.0360 1.3345 0.185 [DELTA]LnXRATE 0.4675 0.2239 2.0879 0.039 [DELTA]LnTBILL 0.0797 0.0176 4.5251 0.000 [DELTA]LnCPI 0.2757 0.3315 0.8316 0.407 [DELTA]LnFPI 0.7713 0.3377 2.2841 0.024 [DELTA]LnM1 0.4790 0.1037 4.6178 0.000 ECM(1) 0.3932 0.0742 5.3007 0.000 [R.sup.2] 0.2670 Adj [R.sup.2] 0.2137 AIC 125.61 BIC 113.11 FStatistics 1949 FSignificance 0.000 D.W. Statistics 2.1000 
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