Laffer curve rates (for example, in the United States by the Congressional Budget Office). While the interaction between tax rates and tax revenue is generally accepted, the precise nature of this interaction is debated. In practice, the shape of a hypothetical Laffer curve for a given economy can only be estimated. The relationship between tax rate and tax revenue is likely to vary from one economy to another and depends on the elasticity of supply for labor, as well as various other factors. Even in the same economy, the characteristics of the curve could vary over time. Complexities such as progressive taxes
Notional Keeneland three weeks before the running of the Kentucky Derby. He will undergo surgery for the injury which is not life-threatening, but there is question about whether he will be able to return to racing. He did not run in any of the Triple Crown races. Having an uneventful four-year-old season, Notional returned to form winning the July 5th, 2008 running of the Salvator Mile Handicap under Joe Bravo. 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