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基于买卖双方的市场势力研究
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摘要
市场势力是指企业所掌握的高于边际成本的价格加成能力,市场势力越大,企业的价格加成能力就越大。随着中国钢铁工业的快速发展,对铁矿石的需求量也不断扩大,国内铁矿石的产量越来越不能满足需求。目前少数国家主导了国际市场定价权,如何把握铁矿石在国际市场上的定价权对中国具有重要意义。
     本文在Song-Marchant-Reed剩余需求弹性市场势力模型的基础上,通过对该模型的进一步修正和扩展,使其更具现实解释力,并运用修正后的模型对国际铁矿石市场进行了测度,衡量了中国和澳大利亚作为买方和卖方分别拥有的市场势力大小,分析了中国在国际铁矿石市场上市场势力缺失的原因,并在此基础上提出了政策建议。
     本文的研究主要观点为:基于买卖双方的视角,在Song-Marchant-Reed模型的基础上,对市场势力的测度模型做了进一步的拓展,使模型更具现实解释力;运用扩展后的模型,对中国和澳大利亚的铁矿石的贸易进行了实证分析,得出了澳大利亚的市场势力为50.44%,中国所拥有的市场势力为27.71%;通过模型分析,得出剩余供给弹性、剩余需求弹性、可替代性、相关产品和海运价格是影响市场势力的主要因素,其中剩余供给弹性和剩余需求弹性是影响市场势力的核心因素。
Market power means that companies have a price mark-up capacity higher than the marginal cost. The greater market power enterprises have, the greater price mark-up they have. With China's rapid development of the iron and steel industry, the demand for iron ore continued to expand, increasing the output of domestic iron ore demand. At present, several countries have dominated the international market pricing. How to make use of iron ore in the international market pricing is of great significance to China.
     On the basis of the Song-Marchant-Reed RDE model of market power, the paper endowed it more realistic explanation through further expansion and amendment. After that, this paper, using the revised model of the international iron ore market, measured the market power of the China and Australia respectively as a buyer and seller, and analyzed the reasons for lack of market power for China's iron ore in the international market, then put forward policy recommendations on this basis.
     This paper's main points are as follows: Based on the perspective of buyers and sellers and on the Song-Marchant-Reed model, this paper made a further expansion for the measurement models of the market power to make them more realistic and explanatory; used the expanded model to analyze the iron ore trade between China and Australia empirically, having concluded market power in Australia is 50.44 %, while in China it's a 27.71% market power; and through model analysis, the residual supply elasticity, residual demand elasticity, alternativity, related products' prices and sea transport prices are the main factors to influence the market prices, of which the residual supply elasticity and residual demand elasticity are the key elements to impact the market power.
引文
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