The optimal suppression of a low-cost technology by a durable-good monopoly
研究耐用品垄断企业在两种技术中选择的问题：若消费者了解所有技术，企业只用低成本技术；若消费者只知已用技术，企业可能先用劣质技术以增加利润，再秘密切换至高效技术。
If a durable-good monopoly can use either of two technologies whose properties are known to consumers, the monopoly uses only the technology with the lowest average cost at low levels of production. If consumers only know about technologies in use, the monopoly may use an inferior technology initially to increase its profits, keeping the new, efficient technology secret and switching later. Thus, in either case, an inferior technology may be used; however, switching between technologies occurs only if consumers are not fully informed about both technologies.