With fast development of the real estate in our country, it has become one of the most important industries in our country now, whether it can healthily develop affects the whole economy to a large extent. The real estate industry also produces lots of problems at the time of obtaining achievement. The basic reason is the outstanding contradiction of the supply and demand structure in the residence market, and the imperfect housing policy. The expert of the abroad put forward the filtering theories at the beginning in the 20's of 20th centuries. With ten years of development, it has already become mature gradually. By analyzing mathematically, filtering model can predict the quantity of new building, study the real estate structure problem, analyze the whole life cycle of the housing price and reflect the movement mechanism of the market really.The usage of the model is the burgeon stage in the domestic. According to filtering theory and the successful filtering model in abroad, aiming at the blank of filtering model research currently in Nanjing, this text systematically and deeply studies the concept of filtering theory, the development process of filtering model, severals of typical filtering model in abroad, it's market conditions and the supply and demand structure in Nanjing. Then according to the Nanjing market, this article put forward the suggestion that can be operated. In order to promote effectiveness in practice, the article analyzes ohls's"the general and balanced market filtering model", adjusts the model according to the actual market in Nanjing. The model is used to imitate the policy of mid-low price that will be implemented and gives advice for making market better. |