“…This analysis splits the automaker's profit flow into two components, one for product sales profits and the other for additional benefits or costs incurred in carbon trading under the dual credit policy (Li et al, 2020). Firstly, we consider a conventional vehicle company that is currently producing an FV with a production cost of and with a price of with is a constant reflecting the sensitivity of quantity to price, represents the installed capacity, this multiplicative demand curve is widely used in the literature, e.g., Comincioli et al (2021) and Hagspiel et al (2021), is the demand shift parameter assumed to undergo a geometric Brownian shock, and geometric Brownian motion is often used to describe the standard diffusion process of a stochastic variable, e.g., Comincioli et al (2021), Nishihara et al (2019) and Sarkar (2021), as shown in Equation (). in which and are the FV drift rate and volatility parameter, respectively.…”