How Coupled Are Decoupled Farm Payments? AReview of the Evidence

This survey paper explores the literature on decoupling of farm programs that has emerged inthe last 10 years. The paper identifies and assesses the various channels of potential coupling ofdecoupled farm payments and provides a taxonomy of coupling mechanisms found in theoreticaland empirical papers. Coupling of decoupled payments is pervasive but effects when measurableare small, with the exception of the impact on land values. The paper points to unresolved issueson potential coupling mechanisms for further research.[...]