[4] In the moment, aftermarket goods mainly include products and services for replacement parts, upgrade, maintenance and enhancement.
[6] Lock-in effect or installed-base opportunism refers to the situation where the customers can only purchase the aftermarket goods produced by original equipment manufacturer.
[10][11] There have been a significant number of economic literature discussing about the aftermarket monopolisation after US Supreme Court's 1992 decision in the case Eastman Kodak Company v. Image Technical Service.
[1][4] The Chicago school economists and advocates of this approach assert that aftermarket monopolization would not be harmful for the following reasons:[7][13] In addition, the Chicago school argues that aftermarket monopolization enables manufacturers to afford investments into quality improvement of their original equipment; consumers may benefit from quality primary goods for lower price and overall economic efficiency therefore increases.
Thus, now there is consensus that aftermarket monopolization has potential harms even when consumers are fully informed about the whole lifecycle costs with the competitive primary market.