关键词: 互联网普及, 机械化水平, 长江经济带, 全面FGLS估计

Abstract:  The popularization of the Internet and the level of mechanization play important roles in the transformation and development of the pig breeding industry. Based on the relevant panel data of provinces (cities and districts) in the Yangtze River Economic Belt,  a comprehensive FGLS estimation was constructed to test the impact of Internet popularization and mechanization level on pig productivity,  and it was found that both of them significantly promoted pig productivity. At the same time,  according to the law of diminishing marginal returns,  the promotion effect of Internet popularization and mechanization on pig production capacity may be nonlinear and affected by a certain level of development. Therefore,  threshold variables of different development levels were introduced to build a threshold model to test the nonlinear promotion effect of the two on pig productivity. The results showed that the popularity and mechanization of the Internet were affected by the threshold variables of different development levels. When the development level was lower than 0.016 8,  the impact coefficient of Internet popularization on pig production capacity was 0.053 333 5,  which was significant at the level of 5%. When the development level was higher than 0.016 8,  the impact coefficient of Internet popularization on pig production capacity decreased to 0.018 617 2 and lost significance. When the development level was lower than 0.017 2,  the influence coefficient of mechanization level on pig production capacity was 0.218 45,  which was significant at the level of 1%. When the development level was higher than 0.017 2,  the influence coefficient of mechanization level on pig production capacity was reduced to 0.149 116 3,  which was significant at the level of 5%. The above research results showed that the popularity of the Internet and the level of mechanization have a nonlinear promoting effect on the pig production capacity of provinces (cities and districts) in the Yangtze River economic belt. The promoting effect of the popularity of the Internet and the level of mechanization on the pig production capacity was regulated by the threshold effect of different development levels. Only at the most appropriate development level can the promotion effect of the popularity of the Internet and the level of mechanization on the pig production capacity be maximized. Thus,  it is proposed to promote the indepth integration and development of ecommerce subjects and breeding entities and build an online trading platform. Suggestions were made on improving the innovation ability of mechanization,  building a “Trinity” mechanized talent team,  and improving the use efficiency of information technology and mechanical equipment in the pig breeding industry.

Key words: Internet popularization, mechanization level, Yangtze River Economic Belt, comprehensive FGLS estimation