Laffer curve is simplistic in that it assumes a single tax rate and a single labor supply. Actual systems of public finance are more complex, and there is serious doubt about the relevance of considering a single marginal tax rate. In addition, revenue may well be a multivalued function of tax rate; for instance, an increase in tax rate to a certain percentage may not result in the same revenue as a decrease in tax rate to the same percentage (a kind of hysteresis). Furthermore, the Laffer curve does not take explicitly into account the nature of the tax avoidance taking place.
Notional Notional Notional (born February 1, 2004 in California) is an American Thoroughbred racehorse. He was sired by In Excess and out of the mare Truly Blessed. His damsire, French Deputy, is a son of the 1997/98 Leading sire in North America, Deputy Minister. Notional is trained by Doug O'Neill for owner J. Paul Reddam, who also have three-year-olds Great Hunter and Liquidity in their stable. Racing at age two, Notional's best showing in a stakes race was a third in the 2006 Hollywood Prevue Stakes. In his three-year-old debut, Notional won January's Grade II San Rafael Stakes at Santa Anita