Analysis of Factors Affecting Freight Demand Based on Input-Output Model

Table 7

The fitting effect of different models and the predicted value of freight volume comparison.

	Unary linear function	Power function	Logarithmic function
Fitting curve
Fitting equation
R^2	0.977	0.966	0.923
Freight volume forecast in 2035	1344.17	943.34	644.85
Freight volume forecast in 2050	2102.55	1259.68	725.18

Data source: China National Bureau of Statistics and the author’s calculation, unit: 100 million tons.