Nitrogen-land substitution in corn production: A reconciliation of aggregate and firm-level evidence
Nitrogen-land substitution in corn production: A reconciliation of aggregate and firm-level evidence
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DOI：
10.2307/1243776
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发表时间：
1996-02-01
影响因子：
4.2
通讯作者：
Vroomen, H
中科院分区：
文献类型：
--
作者：
Hertel, TW;Stiegert, K;Vroomen, H
在这篇论文中，我们试图协调氮素之间的低农场水平替代弹性。对于化肥和土地，玉米部门具有较大的行业水平价值，这是通过一个微观模拟模型来实现的，该模型基于印第安纳州的调查数据确定了23个不同的玉米农民群体。在控制了土壤质量、坡度、轮作和自然氮源之后，化肥施用量仍然存在相当大的差异。模型模拟表明，估计的州水平替代弹性(1.15)与很低的农场水平替代弹性是一致的。这一差异可归因于相对价格冲击之后的构成变化。这些组合效应可能非常重要，但在大多数政策分析中都被忽视了。
In this paper we seek to reconcile low farm-level substitution elasticity between nitrogen. fertilizer, and land, with larger industry-level values for the corn sector, This is accomplished with a micro-simulation model which identities twenty-three heterogeneous groups of corn Farmers based on survey data for Indiana. After controlling for soil quality, slope, crop rotation, and natural nitrogen sources, considerable variation in fertilizer application rates remains. Model simulations indicate that the estimated substitution elasticity at the state level (1.15) is consistent with very low farm-level substitutability. The difference is attributable to compositional changes in the wake of relative price shocks. These compositional effects are potentially very important but they are ignored in most policy analyses.