Variables | Symbols | Metric or description | Unit |
---|---|---|---|
Dependent variables | lnsales | Logarithm of monthly sales of vehicle series | Car |
Core independent variable | Policy | The variable is 1 if a new energy vehicle model receives the fiscal subsidy and 0 otherwise | None |
Control variables | Price | Price of vehicle series | Yuan |
Range | Driving range of each type of NEVs | km | |
Engine | The variable is 1 if the engine of the NEV is naturally aspirated, and 0 if it is turbo charged | None | |
Brand | The variable equals 1 if the NEV is a luxury brand, and 0 otherwise | None | |
Typecar | typecar = 1 if the NEV is an MPV or sports car, 2 if it is an SUV, 3 if it is a sedan | None | |
Fuel | The variable is 1 for a PEV, 2 for an AEV, 3 for a PHEV | None | |
Firm | The variable is 1 for a joint venture car, 2 for an imported car, 3 for a wholly foreign-owned car, and 4 for an independent car | None | |
 | Drive | The variable equals 1 for FWD, 2 for RWD, 3 for AWD and 4 for other drive systems | None |