business profits "Manufacturing companies with complex and lengthy international supply chains, such as the automotive industry, could also face significant challenges. These developments could also have a significant impact on productivity growth. " In 1937, American economist Robert coase (R. H. Coase's publication of the essence of the enterprise is considered to be the beginning of a discussion on this issue. Phoenix iMarkets compiled from ZeroHedge, according to government data compiled by Labyrinth consulting services, the growth trend of U.S. personal vehicle mileage (VMT) has been steady since June 2017. The possibility of a halt to growth in U.S. personal vehicle miles (VMT) has been around since the start of 2014, which could signal a slowdown in crude oil consumption.