一、房地产市场分级分析研究土地一级市场，不得不首先对房地产市场进行分级和定义。目前，社会上对房地产市场分级的说法颇多，但大多数是约定俗成，没有科学的定义。笔者以为，房地产市场可按以下原则分级：土地一级市场：土地使用权从无偿划拨到有偿使用的转变（土地出让）? First, the grading analysis of the real estate market First-class market of land, had to first grade and define the real estate market. At present, there are a lot of social opinions on the classification of the real estate market, but most of them are conventional and have no scientific definition. The author believes that the real estate market can be graded according to the following principles: The primary land market: the transfer of land use rights from unpaid to paid use (land transfer)?