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基于面板VAR模型的农业用水与农业经济增长关系研究

2017-06-05许永欣马骏��

山东农业科学 2017年5期

许永欣+马骏��

摘要:基于2002—2014年中国省级面板数据,通过构建农业用水量与农业经济增长的面板VAR模型,并进行单位根检验、协整检验和模型估计与分析,研究了农业用水量和农业经济增长之间的内在关系。结果表明:东部、中部和西部的农业用水量和农业经济增长之间存在着长期协整关系;此外,由于存在个体差异,不同地区农业用水量和农业经济增长之间的关系存在差异,东部地区是负相关、中部地区是正相关、西部地区存在正相关也存在负相关。建议通过优化产业结构和技术水平来提高水资源利用效率,控制和减少农业用水资源的消耗量,并且不同地区因地制宜,采取不同的水资源政策。

关键词:面板VAR模型;农业用水;农业经济增长

中图分类号:S273文献标识号:A文章编号:1001-4942(2017)05-0159-05

Research on Relationship Between Agricultural Water and

Agricultural Economic Growth Based on Panel VAR Model

Xu Yongxin1,Ma Jun1,2,3

(1.School of Business, Hohai University, Nanjing 211100,China;

2.Post-Doctoral Laboratory of Theoretical Economics, Nanjing University, Nanjing 210093, China;

3.Water Resources and Sustainable Development Research Center of Jiangsu Province, Nanjing 210098,China)

AbstractBased on Chinese provincial panel data from 2002 to 2014, through establishing panel VAR model between agricultural water and agricultural economic growth and carrying out the unit root test, co-integration test and model estimation and analysis, the internal relations between agricultural water and agricultural economic growth were studied. The results showed that there were long-term co-integration relationships between the agricultural water and agricultural economic growth in the eastern, middle and western area, and the relationships existed differences in different areas because of individual difference. The agricultural water and agricultural economic growth was negatively correlated in the eastern,but positively correlated in the middle, and there were both negative relationship and positive relationship in the western. We suggested to optimize the industrial structure and technical level to improve the utilization efficiency of water resources, control and reduce the consumption of agricultural water and conduct different water policies in different regions.

KeywordsPanel VAR model; Agricultural water; Agricultural economic growth

水资源是农业经济增长的重要资源。《2014年水资源公报》显示,2014年全国总用水量6 095亿立方米,其中农业用水占63.5%,近年来随着经济的快速增长,对水资源的需求越来越大,同时污染也越来越严重,使得水资源日益稀缺,成为中国面临的最主要的生态和社会经济问题之一,并严重制约着经济可持续发展,因此水资源管理问题成为21世纪中国资源环境的首要问题。

现有的关于水资源和农业经济增长关系的研究主要分为两类:第一类是分析农业经济增长对水资源的影响,研究方法主要包括环境库兹涅茨曲线和脱钩分析。鲁晓东等[1]拟合了中国总体和各流域的EKC曲线,结果发现,中国的水资源质量变化并不符合经典的EKC曲线,而且不同流域的EKC曲线不完全相同,它不仅受到经济增长和产业特征的影响,还会受到能源使用特征的影響。……

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