Research on the impact of land titling on farmers' agricultural production efficiency 并列题名：Research on the impact of land titling on farmers' agricultural production efficiency Research on the influence of agricultural production agglomeration on grain production efficiency Research on the impact of corporate social responsibility on investment efficiency research on the impact of e-hailing on the travel industry Research on the impact of agricultural organization on production technology efficiency The impacts of urbanization on agricultural land use efficiency 并列题名：The impacts of urbanization on agricultural land use efficiency 并列题名：Research on the influence of agricultural production agglomeration on grain production efficiency Study on the relationship of the rural labor flow, variation of factors structure and agricultural production efficiency