Abstract: In this paper we show that the study of the farm size-productivity relationship hinges on the choice of productivity measure. Our main insight is that using yields, a partial measure of productivity, may not be informative for the size-productivity relationship because, in addition to total factor productivity, yields pick up input markets distortions and deviations from constant returns to scale. We examine the empirical relevance of this insight using detailed microdata from Uganda. We find an inverse relationship between yields and farm size. We show the relationship turns positive when accounting for market distortions and returns to scale; or when using a farm-specific component of total factor productivity.
Keywords: Farm size, productivity, yields, land markets, distortions, agriculture, policy.
JEL Classification: O12, O13, Q12, Q15.