Pokhrel Keshav P, Sharaf Taysseer, Bhandari Prem, Ghimire Dirgha
Department of Mathematics and Statistics, University of Michigan-Dearborn.
University of Michigan, Ann Arbor, Institute of Social Research, 426 Thompson St, Ann Arbor, MI 48104.
Agric Res. 2020 Dec;9(4):675-683. doi: 10.1007/s40003-020-00465-4. Epub 2020 Mar 16.
To leave or not to leave farming? This is a dilemma facing a large number of farm households in a rural agrarian setting of Nepal where nearly two-thirds of the population is small holder farmers. Using the uniquely detailed retrospective panel data collected in 2015 from farming households, we examine the influence of the access to cultivated land holding and land tenure on subsequent farm exit. We address the statistical modeling issue of complete separation by developing a robust Bayesian predictive model to predict the probability of farm exit. We use the Bayesian framework with weakly informative prior to carry out the logistic regression model and compare it with other available binary response models. Our results show that the size of cultivated land has a strong negative influence on farm exit, net of all other controls. Moreover, farmers who rented farmland from others or who rented farmland to others were significantly more likely to exit farming. We estimate that a farm household required at least 5 Katha of land (one sixth of a hectare) per year to stay in farming.
离开还是不离开农业?这是尼泊尔农村农业环境中大量农户面临的困境,该国近三分之二的人口是小农户。利用2015年从农户收集的独特详细的回顾性面板数据,我们研究了耕地持有量和土地保有权对随后农场退出的影响。我们通过开发一个稳健的贝叶斯预测模型来预测农场退出的概率,解决了完全分离的统计建模问题。我们使用具有弱信息先验的贝叶斯框架进行逻辑回归模型,并将其与其他可用的二元响应模型进行比较。我们的结果表明,在扣除所有其他控制因素后,耕地面积对农场退出有强烈的负面影响。此外,从他人那里租用农田或向他人出租农田的农民退出农业的可能性明显更高。我们估计,一个农户每年至少需要5卡塔(六分之一公顷)的土地才能继续从事农业。