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本文主要是指市场失灵公共物品的供给不足。公共物品是指消费的非排他性和非竞争性的产品的过程中。所谓非排他性的，也就是说，生产这类产品时，生产者不能排除他人知道如何良好的消费价格。所谓的非竞争的，因为生产者，多个消费者，其中至少一个消费者不会影响生产成本，是零消费的边际成本，而消费者消耗的，只要它不产生拥塞将不会影响他们的消费水平。这些产品，如消防，公安，航标灯，路灯，电视信号接收，等。

This paper mainly refers to market failure referred to inadequate supply of public goods . Public goods refers to the process of consumption of non- exclusive and non-competitive products. The so-called non-exclusive, that is, when such products are produced , the producer can not exclude others know how good the price of consumption . The so-called non-competitive because the producers , multiple consumers , at least one consumer will not affect the production cost , the marginal cost of consumption is zero , while the consumers are consuming , as long as it does not produce congestion will not affect their consumption levels. These products such as fire , police, beacon lights, street lights, TV signal reception , etc., so these products are also known as non-profit products. Essentially, the production of public goods and the role of market mechanisms are contradictory, producers are not actively producing public goods , and public goods is a full member of society must consume the products, which meet the situation also reflects a country's welfare level , this way , the production of public goods lags behind the economic development needs of the members and the contradiction between the very sharp .

但是，它必须被注意到，中国的大量的空置房数量，造成浪费资源，和另一方面的公共租赁住房严重不足，不能保证公民的基本权利，单纯依靠市场是难以有效地保护公民的基本社会权利，政府应通过直接提供电源，或使用必要的行政手段进行干预，以保护公民的权利，这是市场经济的发展是不矛盾的，因为政府直接提供的公共物品市场故障区域或必要的干预是必要的，而不是补充破坏市场经济和改善。

But it must be noted that China's large number of vacant housing , resulting in a waste of resources , and a serious shortage of public rental housing on the other hand , can not guarantee the basic rights of citizens , relying solely on the market is difficult to effectively protect citizens' basic social rights , the government should be through direct provide the supply or use administrative means necessary to intervene to protect citizens' rights , which is the development of a market economy are not contradictory, because direct government provision of public goods market failure areas or necessary intervention is necessary for the market economy and improvement rather than supplement destruction.

The theory, as I study the problem of housing security system architecture provides a theoretical basis , and the point of this paper has an important role in guiding the formation .

Guangzhou is China's first low-income urban populations to carry out the work of the city housing security one . In the late seventies early eighties, Guangdong is China's reform and opening up experimental fields , Guangzhou experienced three decades of ups and downs of the housing reform , China 's first commercial district was born in Guangzhou City, Dashatou wastewater pond - East Lake Village , China 's first limit room also produced in Guangzhou . After 30 years of development and accumulation, Guangzhou, housing security formed a unique pattern , and achieved remarkable results.

Guangzhou City in the development of "Waste 66 " and " spike 7 " basis , but also accelerated the housing security legislation , the municipal government in November 26, 2007 in principle the " Guangzhou City public rental housing security system implementation approach "and the "