The supersizing phenomenon where menu prices for large fast food portions appear to be well below their marginal production costs is of considerable scholarly and policy interest. This article examines a monopoly facing demand functions where the single-crossing condition is violated. We find a...

The supersizing phenomenon where menu prices for large fast food portions appear to be well below their marginal production costs is of considerable scholarly and policy interest. This article develops sufficient conditions under which a firm can separate two different consumer types while...