Study On The Characteristics Of International Soybean Trade Based On Complex Network

As the main bulk product in the current global market,with the increasing globalization and integration of economy,soybean trading has also shown a trend of globalization,and the global soybean trading system has also formed a gradually close overall relationship.Visualizing the overall situation of the current global soybean trading can not only reflect the supply and demand of the soybean trading market,but also reflect the position,role and game process of different countries and regions in the trading market.Therefore,the further theoretical analysis and empirical analysis of the global soybean trading network has a high theoretical and practical value for correctly mastering the current and global soybean trading situation and further understanding the soybean trading problems.Firstly,this paper analyzes the international soybean production and trade data in recent years,and finds that countries such as Brazil,the United States and Argentina have strong international market competitiveness,while Chinese soybeans lack competitiveness.Then,the international soybean trade data from July 2018 to June 2020 are selected,the international soybean trade network is constructed based on the complex network,and its characteristic structure and evolution law are analyzed.Through the analysis of unauthorized networks,the results show that from July 2018 to June 2020,the average output of the network declined,which was affected by the trade between the countries and regions and the new crown pneumonia epidemic situation,indicating that the soybean trade between countries or regions was gradually estranged.The cumulative degree distribution of the network obeys the power-law distribution.The network has the characteristics of scale-free,and the height nodes have stronger connectivity advantages.The average clustering coefficient and average path length are small,and the network does not have the characteristics of small world.The degree correlation is always negative.The height nodes tend to the nodes with small connection degree,and the network is a heterogeneous hybrid network.The height nodes are widely distributed and the survivability of the network is poor.Through the study of weighted directed network,it is found that the cumulative intensity distribution of the network also obeys the power-law distribution,and the scalefree characteristic is more obvious than the unweighted directed network,and the connectivity advantage of high nodes is more obvious.There is a big difference in the weight of the main import and export countries or regions of soybean,and the trade flow distribution of the core node in the network is uneven.The modular results show that the current international soybean trade is obviously regional,and there are a series of regional economic groups highly related to geographical location.Finally,this paper makes a summary and prospect,and puts forward policy suggestions on China’s soybean trade,such as focusing on improving the level of soybean output,improving the control and pricing voice of the international soybean industry chain,and gradually constructing the diversified layout of imports.In terms of innovation,the research object of this paper is more than 100 countries or regions participating in soybean market trade in the world,which is rarely studied in the literature at home and abroad.At the same time,based on the latest current events,this paper combines the international soybean trade with the complex network,which provides theoretical reference and policy suggestions for China to deal with the current complex and volatile soybean market.