Figure 3
A line graph compares the economic benefits under different subsidy policies. The horizontal axis represents the price subsidy coefficient ranging from 0.1 to 0.9. The vertical axis represents the economic benefit ranging from -600 to 100. The graph includes three data lines: one in red with inverted triangle markers, one in magenta with circle markers, and one in orange with cross markers. The red line remains relatively flat near the top of the graph. The magenta line starts near the top and gradually decreases as the price subsidy coefficient increases. The orange line starts near the top but decreases more steeply than the magenta line as the price subsidy coefficient increases.Economic benefit comparison among the no-subsidy, price-subsidy and green-subsidy policies under equal subsidy expenditure