Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 The Long-run Relationship between the Financial System and Economic Growth: New Evidence from Iran Abbas Alavi Rad* and Fatemeh Etemadmoghaddam** In this paper, we examine the impact of financial system on economic growth in Iran; with consider other variables affecting the economic growth, such as inflation, trade openness and gross fixed capital formation. So, an attempt has been made to estimate long-run economic growth elasticity to financial system factors by applying Autoregressive Distributed Lag (ARDL) and Dynamic Ordinary Least Squares (DOLS) procedures from 2000:1 to 2011:4. According to the theories and previous empirical studies, financial system factors such as banking sector credit available to the private sector, market capitalisation and stocks traded have positive significant effect on economic growth in Iranian economy. JEL Codes: G21; O43; C22 1. Introduction Empirical investigations about the relationship between financial sector development and economic growth began to appear with Goldsmith (1969). However, the theoretical literature dating back to Bagehot (1873) and Schumpeter (1911) and later broadened by Hicks (1969), McKinnon (1973), and Shaw (1973), highlights the importance of financial intermediation in facilitating economic activity. The literature on relationship between financial sector development and economic growth can be divided into three branches. One strand of this literature examines the impact of stock market developments, namely, market capitalisation, turnover ratio, and stocks traded on economic growth (see Bekaert, Harvey, and Lundblad, 2001; Shen and Lee, 2006). The second strand of this literature focuses on the relationship between banking sector developments, namely, private credit and liquid liabilities, and economic growth (see Amable and Chatelain 2001; Cole, Moshirian, and Wu, 2008). Finally, part of literature examines the effect of stock market and banking sector (commonly referred to as the financial system in the literature) developments on economic growth (see Seetanah et al., 2010; Narayan and Narayan, 2013). This study contributes to this literature by examining the relationship between financial and banking sector developments and economic growth for Iran. Our study is different from the previous studies in Iran in two ways. We, for the first time in previous literature in Iran, examine the financial system (stock market/banking sector developments) on economic growth of Iran. Hoshmand and Daneshnia (2011) examined only effect of banking sector development on economic growth considering other effective factors on economic growth of Iran. Therefore, we extend the Hoshmand and Daneshnia (2011) study by considering the effect of stock market and banking sector developments on economic growth of Iran. A * Department of Economics, Abarkouh Branch, Islamic Azad University, Abarkouh, Iran. Email: alavi_rad@abarkouhiau.ac.ir ** Department of Economic, Science and Research Branch, Islamic Azad University, Yazd, Iran. Email: femoghaddam@yahoo.com 1 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 second way our study is different is as follows. We examine the impact of stock market and banking sector developments indicators on economic growth of Iran with two procedures - the autoregressive distributed lag (ARDL), and dynamic ordinary least squares (DOLS) – to compare model sensitivity based on different estimators. The rest of the paper is as follows: Section 2 reviews existing literature on the link between financial sector and economic growth; Section 3 describes the methodology applied in this research as well as sources of data; section 4 deals with the empirical analysis and section 5 concludes the study. 2. Literature Review Theories give contradictory predictions about the incidence of financial system development on economic growth, and about the separate impact of banking sector on growth and stock market on growth (see Ben Naceur and Ghazouani, 2007). Boyd and Prescott (1986) argue that banks ease information frictions and therefore resource allocation while Stiglitz (1985) and Bhide (1993) defend the idea that banks are more efficient than equity markets in improving resource allocation and corporate governance. However, some models stress that competitive stock markets reduce the counterproductive monopoly power of banks and boost innovation projects (see Allen and Gale, 2000). Finally, some theories argue that banking sector and stock market contribute together to economic growth by improving information dissemination and reducing transaction costs. 2.1. The Stock Market Developments-Growth Puzzle Among literatures on the role of financial sector in the growth process stock market development has received recently considerable attention. Pioneering work from Spears (1991), Pardy (1992) Atje and Jovanovic (1993), show that stock market development is strongly correlated with growth rates of real GDP per capita. More importantly, they found that stock market liquidity predict the future growth rate of economy. Demirg¨u¸c-Kunt and Levine (1996), Demirg¨u¸c-Kunt and Maksimovic (1996) examine the effect of stock market development on economic growth. Filer, Hanousek, and Campos (1999), Rousseau and Wachtel (2000) examined stock market‐growth nexus and exhibited positive casual correlation between stock market development and economic activity. Levine and Zervos (1996) use various indicators of stock market developments for a sample of 41 countries over the period of 1976-1993, and show that there is a significant relationship between measures of stock market developments and economic growth. Van Nieuwerburgh, Buelens and Cuyvers (2006) investigate the long-run relationship between financial market development and economic development in Belgium. They find strong evidence that stock markets development caused economic growth in Belgium. Adamopoulos (2010) investigates the causal relationship between stock market development and economic growth for Germany. The results show that there is a unidirectional causality between stock market development and economic growth with direction from stock market development to economic growth. Many researchers examined the relationship between stock market developments and economic growth during the last decades. But, results are mixed. There exists some authors who could not established any significant link between stock market development 2 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 and growth such as Bencivenga and Smith (1991), Ben Naceur and Ghazouani (2007) and Adjasi and Biekpe (2006) who looked at developing countries (see Seetanah et al., 2010). 2.2. The Banking Sector Developments-Growth Puzzle Previous empirical studies have strongly supported the theoretical proposition that the banking system is an essential determinant of a country‘s economic development (See Levine, 2005). King and Levine (1993) study the impact of banking sector development on growth prospects. Jayarathne and Strahan (1996) find that banking deregulation led to higher regional economic growth within the U.S. Berthelemy and Varoudakis (1996) use a theoretical model with banks acting as Cournot oligopolists to find that, in the stable equilibrium, the growth rate depends positively on the number of banks, or the degree of competitiveness of the financial system. Levine (1998) showed a positive and significant correlation between banking sector development and long-run economic growth in their study of 47 countries. He also suggest that the level of banking development measured as the ratio of bank loans to the private sector to GDP is directly related with the level of economic growth. Levine, Loayza and Beck (2000) measure the growth effect of the ―exogenous component‖ of banking development. Rousseau and Xiao (2007) in their study of China found that banking sector development was central to the Chinese success. Cole, Moshirian, and Wu (2008) Using dynamic panel techniques to analyse panel data from 18 developed and 18 emerging markets, they find a positive and significant relationship between bank stock returns and future GDP growth that is independent of the previously documented relationship between market index returns and economic growth. Wolde-Rufael (2009) re-examines the causal relationship between banking sector development and economic growth in Kenya for the period 1966-2005. He selects money supply (M2), liquid liabilities (M3), domestic bank credit to the private sector and total domestic credit provided by the banking sector and show that banking development promotes economic growth in Kenya. 2.3. The Financial System-Growth Puzzle Over the last two decades, the relationship between economic growth and the financial system, whose components are stock markets and the banking system, has received considerable attention (e.g. Levine, 1991; Capasso, 2008) Levine and Zervos (1998) have focused on the relationship between economic growth and financial system development using both banks and stock markets indicators. They empirically assess the relationship between both stock markets and banks development and economic growth for a sample of 42 countries over the period of 1976-1993. Arestis, Demetriades and Luintel (2001) use quarterly data on five developed countries and find that both banks and stock markets development lead to economic growth. They also find that the impact of banking sector development is substantially larger than that of stock markets development. 3 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 Beck and Levine (2004) examine a panel of 40 developed and developing countries over the period 1976–1998, and estimated the impact of stock market and banking sector developments on economic growth using the Arellano and Blundell system-GMM estimator. They found that stock market and banking sector developments both have statistically significant and positive effects on economic growth Seetanah et al. (2010) focus on a panel set of developing countries with the purpose of simultaneously examining banking sector development, stock market development, and economic growth in a unified framework. Results from the analysis showed that stock market development is an important ingredient of growth, but with a relative lower magnitude as compared to the other determinants of growth, particularly with banking development. Narayan and Narayan (2013) examine the impact of the financial system on economic growth for a panel of 65 developing countries. They find that for the full panel of 65 countries there is evidence of financial sector-led growth, bank credit has a negative effect on economic growth. 3. Data and Model Specification 3.1. Data We use quarterly data in exploring the relationship between financial system and economic growth in Iran. Its information is according to the time series and duration of this study is for the period 2000:1 to 2011:4. The following variables are used in the estimation: economic growth, gross fixed capital formation (GFCF), inflation, trade openness measured as exports plus imports as a percentage of GDP, market capitalisation of listed companies as a percentage of GDP, domestic credit provided by the banking sector as a percentage of GDP, and stocks traded as a percentage of GDP. In our study, the banking sector is proxied by domestic credit provided by the banking sector, consistent with the literature. All data are extracted from the time series data published by the Central Bank of Iran (CBI). 3.2. Model Specification The model that has been used in this research, is based on the principles of some earlier studies (e.g. King and Levine, 1993; Pagano 1993; Demirgiic-Kunt and Levine 1996; Rousseau and Wachtel, 2000; Levine and Zervos, 1998; Christopoulos and Tsionas, 2004; Seetanah et al., 2010; Narayan and Narayan, 2013). The model takes the following functional form: Yt 0 1 X t 2 Ft U t The dependent variable output, Y proxies by the economic growth. X is a vector of core explanatory variables, namely, inflation, gross fixed capital formation, and trade openness (exports plus imports divided by GDP) used to model economic growth. 4 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 F is our measure of stock market/banking sector development, proxied by stocks traded as a percentage of GDP, market capitalisation as a percentage of GDP, and banking sector credit available to the private sector as a percentage of GDP and U is the error term. The empirical analysis in this paper is performed in 3 steps. First, a number of alternative tests are available for testing whether a series is stationary. Usually augmented Dickey Fuller (ADF) and Phillips and Perron (1988) tests have been used by researchers. This study used ADF test for finding unit roots in time series. An indication of whether the researcher should supplement ADF tests by also using the adjustments proposed by Phillips and Perron (1988) can be gained by inspection of the diagnostic statistics from the ADF regression (Perman, 1991). Second, ARDL bound testing procedure is used to establish a cointegrating (long-run equilibrium) relationship between output and financial system proxies. Third, 2 types of cointegration estimation techniques - the ARDL and DOLS - are utilized to estimate the output-financial system regression equation. ARDL proposed by Pesaran, Shin and Smith (2001) and DOLS of Stock and Watson (1993).The main advantage of ARDL and DOLS is because of it flexibility, which is can be applied irrespective of whether underlying regressors are purely I(0), purely I(1) or mutually cointegrated. 4. Empirical Results In first step, we first conduct augmented Dickey Fuller (ADF) test to establish the order of integration for the economic growth (Y), inflation (INF), measure of trade openness (OPEN), gross fixed capital formation (GFCF), measure of banking development (CPS), market capitalisation (MCC) and stocks traded (STT) series. The results of the unit root tests are presented in Table 1. The null hypothesis of unit root is not rejected by ADF test for all series and so are the series non-stationary in the level. We conducted the same test on the first difference of all series and found them stationary. As a result, these data series can be characterized as I(1) for period of analysis. Table 1: Results of Unit Root Test Series Y INF OPEN GFCF CPS MCC STT Order Level st 1 difference Level st 1 difference Level st 1 difference Level st 1 difference Level st 1 difference Level st 1 difference Level st 1 difference 1 ADF -2.6131 -7.1471 -3.5297 -5.5843 -3.5155 -2.9281 -2.4710 -2.9471 -2.2091 -8.4770 -1.9413 -3.6379 -2.2645 -3.5956 1 Augmented Dickey-Fuller unit root test, denotes significance at 5% 5 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 Once all the series are non-stationary in the level, one can estimate an econometric model only if they are cointegrated. It can be concluded from the above discussion that we can use Johansen procedure to establish long-run relationship among variables. But, there are some limitations that can affect the validity of the estimation results. With a quarterly data comprising 48 observations, the Johansen tests can be subject to size and power bias. The importance of applying a correction factor for the Johansen procedure in small samples is now well known. The correction factor is necessary to reduce the excessive tendency of the tests to falsely reject the null hypothesis of no cointegration often associated with data of relatively short span. A number of papers including Reimers (1992) and Cheung and Lai (1993) have documented the importance of this correction factor for the small sample. Cheung and Lai (1993) had provided the correction factor of Johansen likelihood ratio test while Reinsel and Ahn (1992) suggested an adjustment to the estimated maximum eigenvalue and Trace statistics. So, the small number of observations affects the validity of the estimation results. The ARDL model overcomes this problem by introducing bounds testing procedure to establish long-run relationship among variables. Pesaran and Shin (1995) showed that ARDL modeling for univariate cointegration test for small sample will be the most appropriate. Before, applying the ARDL bounds testing to examine cointegration between the variables, we have to select the appropriate lag length for the computation of F-statistics. Given the Quarterly data available for estimation, we set the maximum lag order of the various variables in the model equal to four. In this study, the lag length criteria was obtain from unrestricted VAR estimation results which based on the maximum value of Schwarz Bayesian Criterion (SBC). Based on the VAR estimation, the maximum value of SBC is equal to 4. Narayan (2005) pointed out that the critical bounds developed by Pesaran, Shin and Smith (2001)) are not suitable for small sample. Our sample consists of T = 48, we use critical bounds developed by Narayan (2005). The results of the ARDL bounds testing approach to cointegration are reported in Table 2. Table 2: ARDL Bound Test to Long-run Cointegration Estimated Models F(Y| INF, OPEN, GFCF, CPS) F(Y| INF, OPEN, GFCF, MCC) F(Y| INF, OPEN, GFCF, STT) F– Statistics 5.7120 6.0470 8.6782 Lag order 4 Bound Calculated Value I(0) 4.385 3.219 2.711 I(1) 5.615* 4.378** 3.823*** Diagnostic tests 2 R 0.96 0.97 0.98 Adj-R 0.94 0.95 0.97 2 D.W 2.05 1.75 2.28 Note: *, ** and *** represent significance at 1, 5 and 10% level respectively. Our computed F-statistic exceeds upper critical bound at 1% significance level once economic growth are used as predicted variable. This confirms the presence of cointegration between the variables over the period of 2000:1–2011:4. This entails that vector of core explanatory variables, namely, inflation (INF), trade openness (OPEN), and gross fixed capital formation (GFCF), with consider each financial system variables 6 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 (banking development (CPS), market capitalisation (MCC) and stocks traded (STT) ) and economic growth are cointegrated for long-run relationship in case of Iran. The second stage for univariate cointegration test is to estimate the long-run coefficients of model. Table 3 presents the solved static long-run results of three models with two procedures: models 1-3 estimate by the ARDL and DOLS procedures. In model 1 of Table 3, we estimate the impact of domestic credit provided by the banking Sector on economic growth. We find that domestic credit provided by the banking sector as a percentage of GDP have a statistically significant and positive effect on economic growth only with DOLS procedure. The results suggest that trade openness has a statistically significant and negative effect on economic growth, also inflation has a statistically significant (at the 5% level) and negative effect on economic growth with two procedures. Finally, we find that The GFCF has a statistically significant (at the 1% level) and positive effect on economic growth with two procedures. Table 3: Estimated Long-run Coefficients the ARDL and DOLS Procedures Variable INF OPEN GFCF CPS Model 1 ARDL DOLS a -0.04657 -0.01655 (0.059) (0.0000) a a -1.5791 -2.94717 (0.000) (0.0000) a a 0.00019 0.00023 (0.001) (0.0000) a 0.0004 0.19302 (0.985) (0.0000) Model 2 ARDL DOLS -0.00213 -0.08325 (0.943) (0.2905) a -0.57913 -2.67626 (0.063) (0.0069) a a 0.00012 0.00023 (0.004) (0.0046) 0.01958 (0.168) MCC 0.03441 (0.1035) STT C -2.5399 (0.087) -6.84028 (0.0000) -5.7581 (0.040) Model 3 ARDL DOLS a -0.10327 -0.08339 (0.018) (0.0006) a a -1.0270 -1.24252 (0.002) (0.0000) a a 0.00014 0.00018 (0.001) (0.0000) -6.15285 (0.0157) 0.07169 (0.124) -3.3590 (0.047) 0.087 (0.0226) -5.40781 (0.0050) The p-values are reported to examine the null. Denotes statistical significance at the 1% level. a Next, in model 2 of Table 3, we estimate the impact of market market capitalisation on economic growth. We find that market capitalisation of listed companies as a percentage of GDP have a statistically significant (at the 10% level) and positive effect on economic growth with DOLS procedure. The results show that same to model 1, trade openness has a statistically significant (at the 5% level) and negative effect on economic growth with two procedures, while inflation has a statistically insignificant and negative effect on economic growth with two procedures. In addition, we find that The GFCF has a statistically significant (at the 1% level) and positive effect on economic growth with ARDL and DOLS procedures. Finally, in model 3 of Table 3, we estimate the impact of stocks traded on economic growth. We find that stocks traded as a percentage of GDP have a statistically significant (at the 5% level) and positive effect on economic growth only with DOLS procedure. In addition, the GFCF has a statistically significant (at the 1% level) and positive effect on economic growth with two procedures, while inflation has a statistically significant (at the 7 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 1% level) and negative effect on economic growth. Trade openness also has a statistically significant (at the 1% level) and negative effect on economic growth with two procedures. The estimated coefficients show that financial system variables (CPS, MCC and STT) have a positive effect on economic growth in long-run, and all the regressors are statistically significant at least with one procedure. For the purpose of interpreting the coefficient estimates, it is evidently crucial that the long-run parameter estimates be structurally stable over the sample period of estimation. To test for structural stability of the parameter estimates, this study use a series of parameter constancy tests for I(1) processes proposed by Hansen (1992). The use of Hansen‘s parameter stability testing framework is instructive in the sense that it permits testing for parameter stability as well as for cointegration. This is possible through the use of Hansen‘s test statistic, Lc, which considers instability due to relatively constant parameter variation over the sample period. Thus, this statistic tests the null of cointegration against the alternative of no cointegration. The parameter instability test results presented in Table 4. Table 4: Hansen Parameter Instability Test Models 1 2 3 Lc statistic 0.108565 0.050316 0.173775 Stochastic Trends (m) 4 4 4 Deterministic Trends (k) 0 0 0 Excluded Trends (p2) 0 0 0 Prob.* > 0.2 > 0.2 > 0.2 *Hansen (1992b) Lc(m2=4, k=0) p-values, where m2=m-p2 is the number of stochastic trends in the asymptotic distribution These results are reassuring, as they imply that the long-run parameter estimates in all models are stable even though the sample period. It is noted that Hansen [1992] suggests that the Lc test may also be viewed as tests for the null of cointegration against the alternative of no cointegration. Thus, the test results also corroborate the previous conclusion of cointegration among the variables under study. 5. Summary and Conclusions This paper examines the impact of financial system with inflation, trade openness and gross fixed capital formation on economic growth in the period of 2000:1 - 2011:4 for Iran. The ARDL bounds testing approach to cointegration is used to investigate long-run relationship among the variables. We used domestic credit provided by the banking sector as a proxy for banking sector development and we used two proxies for stock market development, namely stocks traded and market capitalisation. Our findings confirmed long-run relationship between the variables. So, an attempt has been made to estimate economic growth elasticity to financial system factors by applying ARDL and DOLS procedures. The results further reveal that stock market and banking sector development (commonly referred to as the financial system) have a statistically significant and positive effect on economic growth for Iranian economy. The findings of this paper reveal that stock market development is an important ingredient of growth in the 8 Proceedings of 28th International Business Research Conference 8 - 9 September 2014, Novotel Barcelona City Hotel, Barcelona, Spain, ISBN: 978-1-922069-60-3 long-run, but with a relative lower magnitude as compared to the other determinants of growth, particularly with banking development. These results support previous studies such as Arestis, Demetriades and Luintel (2001) for five developed countries and Seetanah et al. (2010) for developing countries. According to the theories and previous empirical studies, other variables such as inflation, trade openness and gross fixed capital formation affect the economic growth for Iranian economy. The negative effect of inflation on economic growth in Iran support recent studies such as Mahmoud Nia and Jafari (2013) for estimation threshold level of inflation and its impact on economic growth in Iran. 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