【正文】 study mainly from land development right theory, land ownership rights, marketstructure and operational. The system of risk prevention research is still in itsinitial stage, and the research on the risks and prevention in the land tickettransaction system is nearly blank strip. So this thesis researched the risks in thev西南大學(xué)博士學(xué)位論文land ticket transaction system, the thinking of research is that diagnosed risks inthe land ticket transaction system firstly, identified the risks in the land tickettransaction system secondly, assessed the risks in the land ticket transactionsystem thirdly, rendered advice according to the risk analysis in the land tickettransaction fourthly, built up the risk prevention system of the land tickettransaction system finally. And the thesis researched the system risks in the landticket transaction system itself, rather than the risks that influenced by thepractical operation or people behavior, revealed the risk sources and operationmechanism, assessed the risk value and importance of the risk, explored the pathsand methods to prevent the risk, designed the risk prevention system and puttedforward policy suggestions. The research results will perfect the tickettransaction system and provide the important theory and the practicalsignificance.1. To evaluate the land ticket transaction system running efficiency anddeficiencyThe land ticket transaction system had achieved obvious social, economic,ecological benefit. One is the innovation of land replacement model betweenrural collective construction land and urban construction land, and set up aunified urban and rural land market. Two is to manifest the value of rural land, toincrease ine and property for farmers and to optimize the rural land spacelayout。 Three is that land reclamation first and then expropriation of the land toreplace firstly expropriating the land and then land reclamation, not only helpedto supply farmland 76600 mus, but also to maintain 32560000 acres of farmlandquantity in Chongqing. Generally, the operating of the land ticket transactionsystem has played a tremendous role in promoting, made a significantcontribution. Although the ticket system has obtained certain result, but with anyinstitutional innovation, there are still some deficiencies in the practice, needed togradually improve. A preliminary exploration of the land ticket system is lack ofsome of the upper law basis。 two is that the price formation mechanism theoriesneed to be explored。 three is that the accrual mechanism still needs furtherimprovement. In the land ticket transaction system some deficiencies wereexposed, which inlluenced the land ticket transaction system39。s normal operationand development on certain level. So we should research these risks, andVIAbstractestablish the risk prevention control system in the land ticket transaction system.2. To qualitatively identify the land ticket transaction system riskFrom risk identification meaning, content and principle, using thebrainstorming, Delphi method and the DSP system risk technology system, wequalitatively identify the land ticket transaction system risk. The points of viewwere just that the problems affected on land ticket transaction system wereconsistent in the three methods. There are five risk factors for land tickets system:farmland protection risks, the risk of national macrocontrol, the impact of thereal estate market risk, the risk of coordinating urban and rural areas and the riskof protecting the interests of fanners. Three methods in breadth and depth aredifferent. Brainstormings predict and analyze the land ticket transaction systemrisk by subjective analysis. It can39。t analyze some risks that not easy to bedetected. Delphi method can identify the risks that not easy to be detected, butbecause the experts39。 time is so limited, the detected risks are not prehensive.DSP system risk of technology system was applied on the system risk, whichcould analyze the system risks prehensively and systematically. There were16 risk points, the balance of cultivated land effect, arable land dynamic balanceeffect, national land management influence, the influence of amount of newlyincreased construction land, the urban and rural construction land use spatialregulation, the city land supply, real estate market monopoly, increased costspush construction land high prices, the real estate market supply increases, themarket does not fully consider the rural development needs, to produce their owndevelopment caused negative effects, is not conducive to the protection offarmers39。 land use of small towns, the reclamation of subject status, to promoterural land social security function need further considered, farmer39。 rights andinterests are not guaranteed in the land tickets landing area and fall inpensation for land expropriation and requisition rationality is worthconsidering. The results that qualitatively identified by risk identificationmethods can supply the study of the risk points.3. To quantitatively identify the land ticket transaction system riskUsing analytic hierarchy process, fuzzy analysis method and prehensiveevaluation method, the thesis quantitatively assess the risks in the land ticketVII西南大學(xué)博士學(xué)位論文transaction system. According to the results of the risk assessment, the land tickettransaction system integrated risk value was , and contrasted with the riskgrade table, the risk to a lesser extent, the risk is still in a controllable state. Inaccordance with the possibility of risk ranking, 5 risks can be ranked as: the riskof protecting the interests of farmers, farmland protection risks, the risk ofnational macrocontrol, the impact of the real estate m