We suggest that opportunity cost estimates of the Common Agricultural Policy (CAP) may be overstated, with potential allocative efficiency gains offset by negative utility effects associated with the loss of domestic food varieties. This is based on an application of the theoretical result that protection of an industry in the presence of product differentiation and home-bias can be welfare-improving. To illustrate the effects of varietal diversity in foods on the economic cost of the CAP, we incorporate asymmetry in consumers' preferences, based on region of origin and characterised by a single preferred (domestic) variety, in a CGE trade model with imperfectly-competitive food processing sectors and explicit representation of policy inter...