农业生产性服务业集聚的空间环境效应研究

Agricultural Producer Service Industry Agglomeration and Spatial Pollution

忽略产业集聚外部性的产业集聚环境效应研究得到产业集聚与环境污染之间“∩”形曲线关系的结论。将农业生产性服务业集聚的外部性纳入其环境效应研究之中,借鉴空间计量经济学对线性模型因遗漏具有空间属性的非观测变量引发内生性问题的处理技巧,基于外部性的空间属性构建起包含农业生产性服务业集聚及其外部性对环境影响的空间库兹涅茨曲线。结果表明:环境污染与农业生产性服务业集聚之间构成“∩”形曲线关系,而与农业生产性服务业集聚的外部性之间构成“∪”形曲线关系;由于空间库兹涅茨曲线所涵盖的2条曲线形状相反且曲线“拐点”差异明显,因此无法得到关于农业生产性服务业集聚环境效应的确定性结论;当集聚程度偏低和偏高时,农业生产性服务业集聚的环境效应并不明确,仅当集聚程度处适中时,才能得到农业生产性服务业集聚加重环境污染的确定性结论。

Excluding externality from agglomeration,the“∩”curve has been used to depict relationship between agglomeration and pollution.This article includes relationship between pollution and externality from agglomeration of agricultural producer service.Using newly spatial econometrics which can solve the endogenous problem induced by un-observed variable omitted from linear model,the Kuznets curve with spatial structure is constructed based on spatial spillover of externality,which includes double effects from agglomeration of agricultural producer service and its externality.The results show:The“∩”curve can be used to depict relationship between agglomeration of agricultural producer service and pollution,and the“∪”curve can be used to depict relationship between pollution and externality from agglomeration of agricultural producer service.Because of differences between the two curves,we can’t always get the relationship between agglomeration of agricultural producer service and pollution.When lower or higher agglomeration,the impact from agglomeration to pollution is uncertain.And when medium agglomeration,agglomeration makes pollution heavier.