Derived Demand and Relationships between Prices at Different Levels in the Value Chain: A Note
指出，当中间商生产技术中只有一种可变要素时，价值链不同层级的价格会随时间成比例变动，这是价格传导弹性等于1的唯一条件，从而可用价格检验派生需求弹性是否包含消费者弹性信息，并以挪威鳕鱼数据为例。
In this paper we note that when there is only one variable factor in the intermediaries' production technology, prices at different levels in the value chain will move proportionally to each other over time. This is also the only general condition under which the elasticity of price transmission is equal to one, so that retail price signals are perfectly transmitted to primary product producers and vice versa. This allows a test of whether derived demand elasticities contain information about consumer elasticities using only prices. An empirical illustration is provided using data from the Norwegian cod sector.