以美国为例,剖析住房市场过滤机制的空间表现形态及其背后的五个影响因素;阐述美国保障房由供给保障向需求保障的转变过程,论述美国政府如何运用这五个因素,将保障房纳入到整个住房市场中,从而完善住房体系过滤机制,实现住房资源最佳配置。 Taking the United States as an example, this paper analyzes the spatial manifestations of the filtration mechanism in the housing market and the five influencing factors behind it. It also expounds the process of the transition from the supply guarantee to the demand assurance in the US, discusses how the U.S. government uses these five factors, Into the entire housing market, thus improving the housing system filtering mechanism to achieve the best allocation of housing resources.