Tracing the Effects of Agricultural Commodity Prices and Food Costs
估计食品加工业的产品和投入需求方程，追踪农产品价格、加工成本与食品价格之间的联系，发现非物化技术变革降低了农业原料需求，但质量提升和相对价格下降抵消了这一趋势。
We estimate a system of product and input‐demand equations for food‐processing industries to trace the links among farm commodity prices, food‐processing costs, and food prices. Disembodied technical change, which likely reflects increasing consumer demand for convenience and product variety, has sharply reduced agricultural materials demand relative to most other food‐processing inputs. This implies weakening impacts of farm price shocks on food prices. But improving quality and falling relative prices for agricultural inputs, in combination with increasing factor substitution, has counteracted these forces to encourage greater usage of agricultural inputs in food processing, and limit these trends.