The economic concept of constant returns to scale (CRS) may be too restrictive to give an accurate description of the agricultural sector. CRS assumes that a change in the level of agricultural production yields an equivalent change in the level of all inputs (such as farm machinery, labor,...

USDA's Economic Research Service (ERS) uses different economic models to estimate the impact of higher input prices on consumer food prices. The present study compares three ERS models. In the first two models, neither consumers nor food producers respond to market prices. We refer to these two...