The Asymmetric Squeeze on US Farm Returns

Farm bill safety net programs trigger payments to farmers when crop revenues fall, but ignore the production costs. This study documents that costs do not fall with revenue declines, at least not for corn. Using USDA cost-of-production data from 1996 to 2024, we find that corn costs rise by 0.31% per 1% increase in revenue but do not adjust downward when revenue falls. The mechanism involves pre-committed input contracts, such as seed licensing, custom operations, and capital recovery schedules, which suppliers do not renegotiate when commodity prices decline. For a corn farmer facing a 20% revenue decline whose costs fall by only 1%, the gap between revenue-based and margin-based measures of financial position is approximately $33 per acre. Corn producers incur excess costs of approximately $38 million per year at the central estimate, primarily concentrated in the Heartland region. In contrast, soybeans experience similar revenue shocks but lack the same contracting rigidities, allowing their costs to adjust more flexibly in both directions. The regional panel analysis confirms that corn faces asymmetric error correction, with a half-life above equilibrium of 5.2 years. These findings suggest that revenue-only indicators of farm financial stress understate the magnitude of costrevenue squeezes during downturns.