Figure 6
The line graph compares price-subsidy and green-subsidy policies based on subsidy expenditure and economic benefit. The x-axis represents the price subsidy coefficient, ranging from 0.1 to 0.9. The y-axis represents the green subsidy coefficient, ranging from 0.3 to 2.1. The graph features two lines: a red line with downward-pointing triangles representing the iso-expenditure line and a blue line with x-shaped markers representing the iso-economic-benefit line. The graph is divided into three regions labeled I, II, and III. Region I indicates that the green subsidy is greater than the price subsidy, and the economic benefit from the green subsidy is greater than that from the price subsidy. Region II shows that the green subsidy is less than the price subsidy, but the economic benefit from the green subsidy is greater than that from the price subsidy. All values are approximated.Policy-space comparison between the price-subsidy and green-subsidy policies based on subsidy expenditure and economic benefit