Measurement model test results
The results shows that all factors structures are reliable when Cronbach’s alpha and Composite reliability coefficients (rho c) are more significant than 0.7 and the AVE indexes are all from 0.5. All factors ensure convergence (Table 1).
The analysis results shows that the square root value of the AVE of each variable is greater than the correlation coefficients between the latent variables and the HTMT Index is less than 0.9, so the concepts achieve discriminant value (Table 2).
Evaluate the quality of observed variables of the factors through PLS-SEM algorithm analysis (Fig 1), showing the results of the outer loading coefficients of the variables from 0.331 to 0.948, in which HQ5 = 0.331, QH7 = 0.635 and TN4 = 0.622 < 0.7 has less statistical significance, so these three variables are removed from the diagram (Table 3).
Structural model testing results
Table 4 shows that the VIF coefficients are all less than 5, showing no multicollinearity phenomenon between the independent and dependent variables.
Path Coefficients represent the P value of Natural -> Land bank = Natural -> Efficiency = 0.718 > 0.05, so it is not statistically significant (Table 5).
Except for the Natural variable, all the impact coefficients of the independent variables in the Original Sample column have positive signs. Hence, the impact relationships in the model are all positive. The order of impact from strong to weak on the Efficiency variable is QD (0.769) > PL (0.609). The order of impact from strong to weak on the land Bank variable is PL (0.581) > QH (0.290) > TC (0.204) (Table 5).
Test the coefficient of determination R2
The R
2 value of efficiency is 0.661, indicating moderate accuracy, meaning that land Bank factors predict 66.1% efficiency. The land Bank’s R
2 value of 0.535 shows a moderate level of accuracy, meaning that the Efficiency factor predicts 53.5% of the land Bank.
Results from the Table 6 show that independent efficiency variables include the land bank variable, which has a strong impact (1.131) and the law and land bank variables, which have a negligible impact (0.036).
Independent variables of the land Bank
Law variables have a substantial impact (0.712), planning and finance variables have a negligible impact (0.084, 0.048) and natural variables have no impact.
Test the relevance of forecast Q2
The cross-validated prediction (Q
2) method was used to measure the predictive fit of the structural model
(Hair et al., 2014). It is the criterion for evaluating the cross-validated predictive significance of the PLS path model (Fig 2). The Q
2 index is considered an index to evaluate the overall quality of the component model.
The study uses blind folding analysis in Smart PLS to estimate the coefficient. Then, evaluate based on the following levels:
· 0 < Q
2 < 0.25: low level of forecasting accuracy.
· 0.25 ≤ Q
2 ≤ 0.5: average level of forecast accuracy.
· Q
2 > 0.5: High level of forecast accuracy.
The Q
2 coefficient is a standard to determine the model’s predictive ability. The Q
2 coefficient values of the variables efficiency and land bank are 0.340 and 0.509, respectively, more significant than 0. It shows that the research model is good quality and appropriate, with a correlation between the secondary and independent variables.
Hypothesis testing
The results of the hypothesis test in Table 7 shows that all factors satisfy the criteria of reliability and validity. However, the structural model used to test the study’s hypothesis is only statistically significant when p-value ≤ 0.05. Five hypothesis were accepted based on the criteria for testing the structural model and 01 hypothesis H4 (P values = 0.718 > 0.05) was rejected. All hypothesis H1, 2, 3, 5 and 6 have a statistically significant relationship at the 5% level. However, hypothesis H4 is not statistically significant.
In which QD plays an intermediary role between the pairs of variables PL - HQ, QH - HQ, TC - HQ, TN - HQ and the variables PL, QH, TC and TN have the same statistically significant impact on the variable. HQ.
The t-test p-value of the relationship Law × Land bank impacts on efficiency is 0.026 < 0.05, showing that the product of Law × Land bank impacts efficiency. Thus, the law regulates the relationship between the Land bank and Land use efficiency. Original sample regression coefficient (O) = 0.124 > 0 shows that changes in the law will increase or decrease land use efficiency through the Land bank.
Table 5 shows that the law substantially impacts the Land bank (original sample: 0.581). It proves that the state managed land by law and strict regulations from land allocation and land lease, bidding for project implementation to investment licensing, construction and taxation. Therefore, the Government of Vinh Long province must promote and effectively implement land law guidelines and policies on creating land banks, ensuring investment attraction through reasonable support capital and conditions to have clean premises for investment.
Next is the planning factor, which has an impact coefficient of 0.290 on the land Bank. The planning process is carried out according to the principle of planning from general to detail; Lower level planning must be consistent with the upper-level planning and the higher level’s planning must reflect the needs of the lower level. In addition, the master plan for socio-economic development is an activity aimed at concretizing the socio-economic development strategy to determine the appropriate spatial sector structure to help socio-economic development. Sustainable society also has a guiding role for lower-level plans. It is a factor that directly impacts land use planning and land bank development, demonstrating the significant role of the master plan for socio-economic development in land bank development. It also shows that there needs to be research on the overall socio-economic development plan in implementing land bank development work, creating a two-way relationship to ensure the land bank’s development work is effectively deployed.
Planning norms affect the decision to approve investment projects. Projects whose scale exceeds planning norms are considered inconsistent with the planning and must be implemented. Therefore, determining planning norms is an important task that needs to be carefully investigated to suit the reality of the area best. Organize the management of land use purposes from the time of planning and announcement. Pay attention to calculating land use efficiency when formulating local land use planning projects, thereby allocating appropriate land use plans without waste. Strictly manage the implementation of detailed land use and construction planning; Resolutely handle cases of non-compliance with planning.
Finance is the final impact factor, with an impact coefficient of 0.204, showing that capital sources from the budget, credit institutions and foreign aid organizations are often difficult to access and the local state does not have an initiative that depends on the factors of the account holder. Therefore, competent authorities must pay attention to investment attraction policies, especially investment projects that use land. At the same time, there is a mechanism to encourage investors to advance capital for land bank creation, encouraging projects used for production and business purposes to invest in industrial parks and industrial clusters in the area.