“…(
2020) and Zhang et al. (
2021a), the service cost of live streaming channel depends on the service level provided by L. Thus, the service investment cost is assumed to be a convex function of the service level, that is,
(Li et al.,
2019b; Zhang et al.,
2021b). In addition, since E and L only display the products (Liu et al.,
2021), while M produces products and processes customer orders, we assume that the unit operation cost of E‐commerce platform or live streaming channel is zero, that is,
(Li et al.,
2019b; Zhang et al.,
2021a).…”