Figure 4
A line graph compares the comprehensive benefits of no-subsidy, price-subsidy, and green-subsidy policies under equal subsidy expenditure. The x-axis represents the price subsidy coefficient ranging from 0.1 to 0.9. The y-axis represents the comprehensive benefit ranging from -120 to 160. Three data lines are plotted: one for no-subsidy policy, one for price-subsidy policy, and one for green-subsidy policy. The no-subsidy policy line remains relatively flat near the top, indicating stable benefits. The price-subsidy and green-subsidy policy lines start high but decline sharply as the price subsidy coefficient increases, with the green-subsidy policy showing a slightly steeper decline. All values are approximated.Comprehensive benefit comparison among the no-subsidy, price-subsidy and green-subsidy policies under equal subsidy expenditure