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英文文献：Does Participation in the Conservation Reserve Program and Off-Farm Work Affect the Level and Distribution of Farm Household Incomes?-参与自然保护区计划和从事非农工作是否影响农户收入的水平和分配?本文利用对美国农户的全国性调查，调查了经营者及其配偶在农场以外工作的决定与参与保护储备计划(CRP)之间的相互关系
英文文献作者：Boisvert, Richard N.,Chang, Hung-Hao
英文文献摘要：
Using a national survey of U.S farm households, this paper investigates the interrelationship among the decisions to work off the farm by the operator and the spouse, and participation in the Conservation Reserve Program (CRP). The effects of these three decisions on farm household income are also examined. By estimating a heteroscedastic household income function, we identify the effects of participating in these activities on the average level of farm household income and its variation within each sub-group of farms involved in the several combinations of activities. Our empirical results support the hypothesis that participation in the CRP and decisions to work off the farm by the operator and the spouse are made jointly rather than independently. The operators' decisions to work off the farm and to participate in CRP increase the mean level of the household income, while the spouses' decisions to work off the farm help decrease the variation in household income among households in that sub-group.
本文还研究了这三种决策对农户收入的影响。通过估计异方差家庭收入函数，我们确定了参与这些活动对农场家庭收入平均水平的影响，以及参与这些活动组合的每个农场亚组内的差异。我们的实证结果支持这样一种假设，即参与CRP以及运营者和配偶在农场以外工作的决定是共同做出的，而不是独立做出的。经营者在农场以外工作和参与CRP的决定提高了家庭收入的平均水平，而配偶在农场以外工作的决定有助于减少该亚组中家庭收入的差异。
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