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  • 详情 Farmland transfer market transformation: Plot-Level evidence from land consolidation in China
    Farmland transfer in developing countries is characterized by informal contracts. Rich research typically attributes this phenomenon to the lack of property rights and rarely emphasizes the influence of land characteristics themselves. Utilizing plot-level data from 2017-2019 collected in Yangshan County, China, we evaluate the impact of land consolidation on the farmland transfer market transformation. We find that land consolidation has a positive impact on the transformation of farmland transfer markets, instead of its scale expansion. After land consolidation, the scope of transaction partners extends from relationship-based households to anonymous new agricultural operating entities; the transfer rent shifts from being free of charge to being paid; and the transfer duration shifts from short-term to long-term. Mechanism analysis reveals that land consolidation increases land value and reduces transaction costs by improving the endowment of farmland resources, thus driving the farmland transfer market transformation. Further exploration warns that market transformation caused by land consolidation may trigger non-grain farming, leading to a 15.2% reduction in the rice planting area and posing potential risks to food security. These findings enrich the existing studies that only focus on the impact of land rights reform, both theoretically and empirically. In practice, it has important policy implications for countries facing similar difficulties in the farmland transfer market as China.
  • 详情 N重连续时间复合期权模型及其在多阶段投资决策中的应用
    本文采用连续时间的多重复合期权Geske及其扩展模型来解决多阶段投资决策问题,在基本Geske公式基础上,给出了具有时变参数的连续时间N重复合期权的扩展Geske公式,并对采用Geske公式和离散期权模型得出的数值结果进行了比较。实例结果分析比较表明,利用已发表的算法和目前的普通PC计算机和数学工具软件,如DATAPLOT、MATHEMATICA等,对连续时间的N重复合期权模型(N ≤ 10)的数值解求解不再具有困难,并且可以得到较其他方法更高精度的计算结果。 Abstract: This paper make uses of N-fold continuous compound option formula to resolve multi-stages investment decision problem, and give an expansion of basic Geske formula to N-fold continuous time option with variable parameters, and then make a comparison of the results of adoption expanded Geske formula with other discrete option formulas such as binomial and trinomial formula. The results show, by means of the popular home PC with mathematic software, such as DATAPLOT, MATHEMATICA etc., the solution procedure if n ≤ 10 is quite easy with a no difficult, and can get the results with higher accuracy than other solution method.