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A Study of Dynamic Influence of Irrigation Infrastructure on Total
Factor Productivity of China’s Crop Industry

SHENG Yu，ZHOU Tiantian，WANG Aizhao，DENG Haiyan

Abstract Irrigation infrastructure construction is of great significance to improve agricultural pro⁃
duction conditions and enhance agricultural productivity.This paper recalculates the total factor productiv⁃
ity of the crop industry in 27 provinces and autonomous regions of China from 1980 to 2018 based on ag⁃
ricultural input-output data and empirically analyzes the different effects of irrigation infrastructure on the
total factor productivity of the crop industry in different periods using structural break model.The results
show that although irrigation infrastructure has played an important role in promoting the total factor pro⁃
ductivity of the crop industry in the past 40 years，its marginal impact varies significantly across regions
and gradually decreases with the transformation and development of agriculture and rural areas，which
leads to a trend of decreasing marginal rate of return on irrigation infrastructure investment over time.
Based on these results，it is advisable to improve the efficiency of irrigation infrastructure through enhanc⁃
ing the regional layout of irrigation infrastructure investment and optimizing the direction of public invest⁃
ment .
Key words total factor productivity of crop industry； irrigation； dynamic influence； internal rate
of return

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