Test Results and Discussion of Research Results


Survey on trends in local spending structure movement with economic growth:

Local budget expenditure is divided into development investment expenditure and regular expenditure. The following figure shows the relationship between development investment expenditure and regular expenditure of locality in GDP and economic growth rate.

Figure 3.2 : FDI expenditure/GDP and economic growth rate (%)



(Source: General Statistics Office & Ministry of Finance, 1990 - 2011)


Local development investment expenditure is considered an expenditure to meet the economic management function of local governments, and at the same time has an important meaning in the current goal of promoting economic growth. From Figure 3.2, we can analyze the preliminary relationship between investment decentralization and growth:

Period 1990 - 1995 : During this period, local investment expenditure in GDP was at an average of 7.16% of GDP, while the economic growth rate increased quite high, at an average of 7.69%. The figure shows the trend of movement in the same direction between the investment expenditure decentralization variable and the growth rate.

Period 1996 - 2000 : After the 1996 Budget Law, along with the impact of the regional financial crisis, economic growth rate


decreased, averaging 5.88%. The rate of decentralized investment spending to localities averaged 7.1% of GDP.

Period 2001 - 2005 : The ratio of decentralized investment expenditure to local governments in GDP averaged 5.47%, economic growth rate during this period reached an average of 7.51%.

Period 2006 - 2011 : After the 2002 State Budget Law, the decentralization of investment spending to local governments tended to increase, at an average of 7.64% of GDP. Due to the impact of the global financial crisis, the average growth rate during this period was only 6.83%.

Thus, in the period 1990-2000, the scale of local investment expenditure moved almost in the direction of GDP growth. This suggests that decentralization of local investment expenditure may be a fundamental factor promoting economic growth in this period. However, in the period 2001-2011, the movement between local investment expenditure and growth rate is not entirely clear. Thus, whether local investment expenditure has an impact on growth or not is still a question that needs to be answered.

Figure 3.3 : DP expenditure/GDP and economic growth rate (%)


(Source: General Statistics Office & Ministry of Finance, 1990 - 2011)


In the period 1990 - 1995 , local recurrent expenditure in GDP was at an average of 9.14% of GDP; meanwhile, the economic growth rate increased quite high, averaging about 7.69%. In the period 1996 - 2000, it seemed that local recurrent expenditure and growth rate moved in the same direction. Specifically, local recurrent expenditure in GDP tended to decrease at an average of 7.09% of GDP and the average economic growth rate was at 5.88%, lower than the previous period. In the period 2001 - 2011, the relationship between decentralization of local recurrent expenditure compared to GDP and growth rate was unclear. In general, it is necessary to conduct empirical analysis to test this relationship.

3.3.2.3. Revenue decentralization and economic growth


Compared to the 1996 State Budget Law, the 2002 State Budget Law has transferred two revenues, special consumption tax and petroleum fees, from 100% of the central budget revenue to revenues divided between the central budget and local budgets, thereby creating a proactive position associated with increased responsibility for local authorities. Decentralizing revenue sources and expenditure tasks between the central budget and local budgets in the direction of increasing revenue for local budgets and encouraging localities to proactively balance their budgets. Clearly defining and enhancing the proactiveness, associated with the responsibility of ministries, branches, localities, and units in managing the state budget and assets; linking the responsibility of budget management and use with the responsibility of organizing the implementation of political and professional tasks of ministries, branches, localities, units, etc. Those changes not only arouse the proactiveness and promote the resources of localities. That is also the foundation for Vietnam's economic growth.


Figure 3.4 : State budget revenue/GDP and growth rate (%)



(Source: General Statistics Office & Ministry of Finance, 1990 - 2011)


Figure 3.4 shows that the rate of local budget revenue decentralization in GDP increased rapidly in the period 1990 - 1996, from 5.5% of GDP in 1990 to 9.33% of GDP in 1996. This period witnessed rapid GDP growth from 5.1% in 1990 to 9.33% in 1996. In the period 1997 - 2000, when implementing the State Budget Law 1996, the level of revenue decentralization to local governments was kept stable at over 7.76% of GDP. However, during this period, due to the regional financial crisis, the economic growth rate declined to its lowest level in 1999 at 4.8%. In the period 2001 - 2011, we can see the trend of revenue decentralization and growth moving in the same direction. Local spending needs average 17.69% of GDP, while allocated revenue accounts for 8.68% of GDP (Table 3.2). Thus, allocated revenue only meets about 50% of local spending needs; therefore, localities must receive fiscal transfers from the central government of about 50% to balance the budget.


3.4. Test results and discussion of research results


To test the model using the OLS method, we test the stationarity of the series. If we estimate a model with a time series in which the independent variable is non-stationary, then the OLS assumption is violated. In other words, OLS does not apply to non-stationary series. Another problem related to non-stationarity is that this variable shows an increasing (decreasing) trend and if the dependent variable also has the same trend, when estimating the model, we can obtain a coefficient estimate with high statistical significance and a high R 2. Because the time series can be explained by the behavior in the present, in the past, the degrees

lags and random factors, so in the testing process we test the model lag. After testing the model using the OLS method, we test the model's suitability to assess the reliability of the testing results.

3.4.1. Stationarity test


To test the stationarity of time series variables, test

Traditional Augmented Dickey - Fuller (ADF) with the hypothesis:

H 0 : 0

=> conclusion

Conclusion: has unit root or non-stationary series;

H 1 : 0 => conclusion: zero string

has a unit root or the series is stationary. The important criterion is that if the t-statistic (calculated in the model) for has a negative value greater than the value of the DF table in the Augmented Dickey – Fuller test, then the null hypothesis H 0 is rejected or the variable is stationary or does not have a unit root. The test results are presented in Table 3.3.


Table 3.3 : Results of testing the stationarity of variables in the model


Variable

Delay

t-Statistic

Prob.*

gi

1

(-2.2632172)***

0.0766

SI

0

(-3.400771)**

0.0243

PGR

0

(-7.015842)*

0.0000

dCG

0

(-6.135499)*

0.0001

dLG

0

(-5.660301)*

0.0002

LG C

0

(-2.941203)***

0.0574

LG I

0

(-2.908097)***

0.0612

LR

4

(-3.676897)**

0.0151

TR

0

(-2.869733)***

0.0659

dTOP

0

(-5.919251)*

0.0001

inf

0

(-3.798081)*

0.0098

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Note : (i) t-statistics in parentheses; (ii) *** significant at 10% level, ** significant at 5% level, and * significant at 1% level.

Table 3.3 shows that the variables gi, LG I , LG C , TR are stationary time series with an acceptable significance level of 10%. The variables SI, LR are stationary at a significance level of 5%. The variables PGR, inf are stationary at a significance level of 1%. The remaining variables are non-stationary, the first-order differences of these series have reasonable stationarity at a significance level of 1%. From here, the study will use the variables gi, Si, PGR, dCG, dLG, LG C , LG I , LR, TR, dTOP to test the models.

3.4.2. Experimental results


3.4.2.1. Model testing results 1


Table 3.4 shows the results of estimation 1, examining the impact of local expenditure variables on economic growth. With R 2 of 0.71 and the Heteroskedasticity, LM and Ramsey Reset tests, the model used is appropriate and satisfies the conditions of the OLS method.


The regression results show that the local expenditure variable ( LG ) has a positive impact on economic growth ( gi ) with a significance level of 10%; the trade openness variable ( dTOP) has a positive correlation (+) with economic growth rate with a statistical significance of 10%; especially the economic growth of the current year is strongly affected by the economic growth of the previous year with a significance level of 1%. However, the model has not detected the impact of the variables CG, SI, PGR and inf on economic growth.

Table 3.4 : Model 1 estimation results


Variable

coefficient

Std. Error

t-Statistic

Prob.

C

1.289088

2.415077

0.533767

0.6025

SI

-0.027761

0.027618

-1.005183

0.3332

PGR

0.585889

0.476116

1.230559

0.2403

dCG

0.175565

0.227827

0.770604

0.4547

dLG

0.251065

0.139507

1.799663

0.0952

dTOP

0.047593

0.026401

1.802695

0.0947

inf

0.033715

0.027504

1.225807

0.2420

gi(-1)

0.614837

0.153629

4.002093

0.0015

R-squared

0.716653

Akaike info criterion

2.891225

Adjusted R-squared

0.564082

Schwarz criterion

3.289139

F-statistic

4.697171

Hannan-Quinn critic.

2.977583

Prob(F-statistic)

0.007975

Durbin-Watson statistics

1.911280

Model suitability testing:

Heteroskedasticity Test: Breusch-Pagan-Godfrey

F-statistic

0.618802

Prob. F(7,13)

0.7321

Breusch-Godfrey Serial Correlation LM Test:

F-statistic

0.238854

Prob. F(2,11)

0.7915

Ramsey RESET Test

F-Satistic

0.0983

Prob. F(1,12)

0.7593


3.4.2.2. Model 2 testing results


Table 3.5 describes the results of estimating model 2, examining the impact of local investment and recurrent expenditure variables on economic growth. With R 2 of 0.74 and using Heteroskedasticity, LM and Ramsey Reset tests, the results show that the model is suitable and satisfies the conditions of the OLS method.

When adding two more variables, local investment expenditure ( LG I ) and local recurrent expenditure ( LG C ), to the model, the results show that the variable LG I has a positive impact on growth with a significance level of 10%; while the variable LG C's impact on economic growth is not statistically significant.

Table 3.5 : Model 2 estimation results


Variable

coefficient

Std. Error

t-Statistic

Prob.

C

-0.576459

2.702478

-0.213308

0.8347

SI

-0.032552

0.042686

-0.762580

0.4604

PGR

0.425655

0.491807

0.865493

0.4037

dCG

0.445368

0.242120

1.839455

0.0907

LG I

0.345461

0.173871

1.986877

0.0703

LG C

0.094115

0.175411

0.536543

0.6014

dTOP

0.079051

0.026806

2.949021

0.0122

Inf

0.028722

0.026348

1.090104

0.2971

gi(-1)

0.475078

0.168263

2.823421

0.0154

R-squared

0.740721

Akaike info criterion

2.897697

Adjusted R-squared

0.567868

Schwarz criterion

3.345350

F-statistic

4.285272

Hannan-Quinn critic.

2.994850

Prob(F-statistic)

0.012069

Durbin-Watson statistics

1.505323

Model suitability testing:

Heteroskedasticity Test: Breusch-Pagan-Godfrey

F-statistic

0.178742

Prob. F(8,12)

0.9896

Breusch-Godfrey Serial Correlation LM Test:

F-statistic

1.098084

Prob. F(2,10)

0.3706

Ramsey RESET Test

F.statistic

0.202110

Prob.F(1,11)

0.6618

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