Building Energy Efficiency Retrofitting (BEER) is an important measure to relieve energy pressure, conserve natural resources and promote urban low-carbon transformation . Governments of various countries have invested huge resources to promote the rapid development of BEER market. However, when the amount of resource input exceeds a certain threshold, the market will deviate from the desired state, falling into a resource trap and cutting consumer welfare. This is due to the fact that BEER service providers take advantage of their dominant position in the market and increase their own revenues by enhancing product heterogeneity. To make matters worse, the greater the government's effort, the earlier the resource trap appears and the more resource loss it causes. Incentives and penalties for service providers became necessary to guide the market to cross resource trap. The research in this paper is conducive to promoting the healthy development of the BEER market, conserving natural resources and promoting urban low-carbon transformation.

建筑节能改造（BEER）是缓解能源压力，节约自然资源和促进城市低碳转型的重要措施。各国政府投入大量资源促进啤酒市场的快速发展。但是，当资源输入量超过特定阈值时，市场将偏离所需状态，陷入资源陷阱并削减消费者福利。这是因为，啤酒服务提供商利用其在市场中的优势地位，并通过增强产品的异构性来增加自己的收入。更糟的是，政府付出的努力越多，出现的资源陷阱越早，造成的资源损失就越大。对服务提供商的激励和惩罚对于引导市场跨越资源陷阱变得必要。本文的研究有利于促进啤酒市场的健康发展，保护自然资源，促进城市低碳转型。