TY - JOUR AU - Metcalf,Gilbert E. AU - Norman,George TI - Oligopoly Deregulation and the Taxation of Commodities JF - National Bureau of Economic Research Working Paper Series VL - No. 9415 PY - 2003 Y2 - January 2003 UR - http://www.nber.org/papers/w9415 L1 - http://www.nber.org/papers/w9415.pdf N1 - Author contact info: Gilbert E. Metcalf Room 3221 Department of the Treasury Washington, DC 20220 1500 Pennsylvania Ave., NW Tel: 202-622-0173 E-Mail: gilbert.metcalf@tufts.edu George Norman Tufts University Department of Economics Medford MA 02155 E-Mail: george.norman@tufts.edu AB - We examine the interplay between market structure and the form that commodity taxation should take in a world in which firms produce differentiated products and so are able to exert some degree of market power. Our analysis takes explicit account of two important recent developments that carry significant implications for market structure and so for the appropriate design and effectiveness of commodity taxation: market deregulation and technological change. In the presence of price discrimination, we find that tax policy loses much of its effectiveness at serving as a substitute for direct regulation. Moreover, in cases where taxes can influence market structure, subsides rather than taxes may be required to achieve optimum market structure. ER -