Lloyd's review of the literature on food price transmission in the Journal of Agricultural Economics (2017) is incomplete in that it omits discussion of technical change and international trade. The purpose of this Comment is to explain why these topics are essential for a proper understanding of price transmission. As a by‐product of the discussion, I show that the pass‐through and pass‐back equations that serve as the basis for Lloyd's theoretical insights are more general than one might think based on Gardner's (American Journal of Agricultural Economics, 1975) discussion of these equations.

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食品行业四十年的价格传导研究：洞察力，挑战和前景：评论

劳埃德（Lloyd）对《农业经济学杂志》（2017）中有关食品价格传导的文献的评论是不完整的，因为它忽略了对技术变革和国际贸易的讨论。本评论的目的是解释为什么这些主题对于正确理解价格传导至关重要。作为讨论的副产品，我证明了作为劳埃德理论见解基础的传递和回传方程比基于Gardner（美国农业经济学杂志，1975年）的讨论所认为的更为笼统。这些方程式。