“…Denote π m , π r , π e and U r as the profits of the manufacturer, retailer, e-commerce platform, and retailer's utility, respectively. Under the manufacturer or retailer direct selling mode, the retailer's vertical fairness concerns about the manufacturer's profit are considered, and the utility function is assumed to be U r � π r − λ(π m − π r ) [15,16,46,51,52], where λ(0 < λ < 1) is the vertical fairness concern coefficient. Under the e-commerce platform agency selling mode, the retailer's vertical fairness concerns about the manufacturer's profit and the horizontal fairness concerns about e-commerce platform's profit are considered, and the utility function is U r � π r − λ(π m − π r ) − c(π e − π r ) [40,46,53], where c(0 < c < 1) is the horizontal fairness concern coefficient.…”