"This paper was prepared for presentation at the Allied Social Sciences meetings, Chicago, August 29-31, 1978."Includes bibliographical references."This paper summarizes the major trends in state and Canadian provincial retail sales taxes in recent years. State sales tax rates have risen slowly; coverage has on the whole been reduced slightly as more states have exempted food and medicines. Sales tax revenue as a percentage of total state tax revenue rose slowly until 1971 and since had remained almost unchanged; revenues from state income taxes have exceeded sales tax revenues since 1973. In Canada, the trend has been toward sharply higher rates (reaching a maximum of 11%), but broader exemptions. Currently, the Canadian Federal government...