农村食物市场、食物消费与营养健康:基于Ⅳ-LASSO方法的检验  

Rural Food Market,Food Consumption,and Nutritional Health:Examination Based on the Ⅳ-LASSO Method

作　　者：王晓兵 赵龙强 闵师 王悦 WANG Xiaobing;ZHAO Longqiang;MIN Shi;WANG Yue

机构地区：[1]北京大学现代农学院中国农业政策研究中心,北京100087 [2]华中农业大学经济管理学院,武汉430070

出　　处：《农业经济问题》2024年第8期25-41,共17页Issues in Agricultural Economy

基　　金：国家自然科学基金“乡镇农贸市场对农村居民饮食消费与营养健康的影响机理与效果研究”(编号:72103072);国家社科基金重大项目“推动农业机械化智能化保障粮食安全的路径和机制创新研究”(编号:22&ZD084);国家社科基金重大项目“新形势下我国粮食安全战略问题研究”(编号:22&ZD079);中央高校基本科研业务费专项资金“乡村振兴战略背景下农村经济转型对农村居民食物消费与营养的影响研究”(编号:11041910122);中央高校基本科研业务费专项资金“面向未来的新型食物系统构建及经济社会影响评估研究”(编号:2662021JC003)。

摘　　要：农村食物市场高质量发展是促进城乡公共服务均等化和推进乡村振兴战略的重要举措,对于满足日益增长的食物消费需求和改善农村居民营养健康具有重要的意义。本文基于2022年三省农户社会经济调查数据,在应用机器学习Ⅳ-LASSO算法筛选出工具变量的基础上,利用工具变量法实证估计农村食物市场对农村居民营养健康的影响及其作用机制。研究结果表明,农村食物市场发展显著影响了农村居民营养健康状况,降低了营养不良发生的概率,但同时也增加了超重发生的可能性。此外,农村食物市场对不同群体特征的农村居民营养健康状况存在异质性作用,尤其对家庭人均土地规模较小的群体作用效果较为明显。机制检验结果表明,农村食物市场主要通过提高家庭膳食质量和营养摄入两条路径来实现农村居民营养健康的改善。在实施乡村振兴战略背景下,本文的研究发现为加强农村基础公共服务设施建设,促进城乡公共服务均等化,提高农村居民营养健康提供了经验证据与决策参考。The high-quality development of rural food markets is an important measure to promote the equalization of urban and rural public services and advance rural revitalization.It is of great significance to meet the growing demand for food consumption and improve the nutritional health of rural residents.Based on the 2022 social-economic survey data of three provinces,this study applies the machine learning IV-LASSO algorithm to select instrumental variables and utilizes the instrumental variable method to empirically estimate the impact of rural food markets on the nutritional health of rural residents and its mechanism.The research results indicate that the development of rural food markets significantly influences the nutritional health status of rural residents,reducing the probability of malnutrition while increasing the likelihood of overweight.Furthermore,the impact of rural food markets on the nutritional health status of rural residents with different characteristics exhibits heterogeneity,particularly for groups consisting of households with smaller per capita land size.Mechanism tests reveal that rural food markets improve the nutritional health of rural residents mainly by enhancing household dietary quality and nutrient intake.Under the background of implementing the rural revitalization strategy,this research provides empirical evidence and decision-making references for strengthening the construction of basic public service facilities in rural areas,promoting equalization of urban and rural public services,and improving the nutritional health of rural residents.

关 键 词：农村食物市场 膳食质量 营养健康 Ⅳ-LASSO 

分 类 号：F327[经济管理—产业经济]