Chau and de Gorter's paper is focused in the micro-tradition-how do specific price and income policies affect exit/entry, production, and trade. The article is pretty strong on mathematics. However, the graphics greatly clarify the math, and help intuitive thinkers like us. Some further clarification is necessary to show how U.S. policies correspond to the Chau-de Gorter assumptions. First, defining Ps, to be an ad valorem subsidy paid only on the export (over-quota) quantities does not reflect U.S. commodity policies because the U.S. Loan Deficiency Payments are deficiency payments from a fixed price that are paid on all production, not just exports. Nevertheless, their analysis still applies to U.S. LDPs because the critical characteristic of P, is that it is higher than P, at the margin. Secondly, more clarification is needed to establish whether their analysis strictly applies to the U.S. PFCs, Direct Payments, and CounterCyclical Payments. Their theoretical model is derived from analyses involving quotas having in-quota and over-quota prices. In the United States, however, producers get paid the same PFC, Direct Payment, and Counter-Cyclical Payment irrespective of the price they receive or quantity they produce. Hence Chau and de Gorter's subsidy m does not strictly correspond to the PFCs or Direct Payments (which depend on neither) or the Counter-Cyclical Payments (which depend on aggregate season average prices, but not on individual quantities produced). When the subsidy m is paid as a lump sum, both the target price Pd and the base B used to determine m are no longer relevant to producer decision making. Though producers know their own base, and Pd is published; for forward decision making they are both red herrings. First, in both figures la and ib, a rational producer will not produce at any price, P1, less than the minimum of AVC unless he/she perceives m to be conditional on producing B, either in regulation or in production. To do otherwise is to take an avoidable loss on
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