Demand for Beef and Chicken Products: Separability and Structural Change
估计了肉类产品动态需求系统，发现消费者选择的是具体肉类产品而非“牛肉”“鸡肉”等大类，并检测到鸡肉需求每年增长6.4%、牛肉餐桌切块需求下降3.5%的结构变化。
Abstract Dynamic almost ideal demand systems are estimated for meat aggregates and for disaggregated meat products. Tests for weak separability show that consumers choose among meat products rather than meat aggregates such as “beef” or “chicken.” Therefore, tests for structural change in the meat aggregates may be biased. Tests for structural change in the meat products show an exogenous constant annual 6.4% growth in chicken parts demand from 1965 to 1985 and a 3.5% decline in beef table cut demand after 1974. Increased demand for convenience may explain these changes.