Han Hongyun, Zou Kai, Yuan Zhen
China Academy for Rural Development, School of Public Affairs, Zhejiang University, China.
Sci Total Environ. 2023 Nov 1;897:165175. doi: 10.1016/j.scitotenv.2023.165175. Epub 2023 Jun 30.
The promotion of agricultural green production technologies (AGPTs) is a fundamental channel of agricultural sustainable development, and the capital endowments that drive farmers to adopt AGPTs have sparked an enormous interest. Given the mixed findings of 237 primary empirical studies on the link between capital endowments - AGPTs adoption, this systematic quantitative review conducts a meta-regression analysis method to estimate the genuine effects of different capital endowments in terms of eleven proxy factors on AGPTs adoption in China. Combining the estimation strategies of Weighted Least Squares (WLS) and Bayesian Model Averaging (BMA), our findings reveal that three proxy factors (Technical training, Family income, and Government subsidies) are infected by publication bias, and the study-to-study variation between those published studies that focus on these proxy factors stems from several heterogeneity features, such as the types of AGPTs, measurements of adoption decision, and model specification. After controlling the above issues, there are still six proxy factors attached to five types of capital endowments-Technical training, Labor force, Assets, Land size, Social network, and Government subsidies-present positive and significant genuine effects on AGPTs adoption. These effects are robust to different estimation strategies or model specifications. As farmers normally possess a low level of capital endowment and willingness to adopt AGPTs in most developing countries, such study findings are expected to provide some enlightenment for future research and policies related to the effective promotion of AGPTs, which may contribute to carbon reduction, environmental protection of farmland, and agricultural sustainable development.
推广农业绿色生产技术是农业可持续发展的根本途径，而驱动农民采用农业绿色生产技术的资本禀赋引发了极大关注。鉴于237项关于资本禀赋与采用农业绿色生产技术之间联系的初步实证研究结果不一，本系统定量综述采用元回归分析方法，以11个代理因素估计不同资本禀赋对中国采用农业绿色生产技术的真实影响。结合加权最小二乘法（WLS）和贝叶斯模型平均法（BMA）的估计策略，我们的研究结果表明，三个代理因素（技术培训、家庭收入和政府补贴）受到发表偏倚的影响，关注这些代理因素的已发表研究之间的研究间差异源于几个异质性特征，如农业绿色生产技术的类型、采用决策的衡量方法和模型设定。在控制上述问题后，仍有五个类型资本禀赋的六个代理因素——技术培训、劳动力、资产、土地规模、社会网络和政府补贴——对采用农业绿色生产技术呈现出积极且显著的真实影响。这些影响对于不同的估计策略或模型设定具有稳健性。由于在大多数发展中国家，农民通常资本禀赋水平较低且采用农业绿色生产技术的意愿不高，预计此类研究结果将为未来与有效推广农业绿色生产技术相关的研究和政策提供一些启示，这可能有助于碳减排、农田环境保护和农业可持续发展。
