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
Arthur Laffer Company funded by Tako Ventures, a funding arm of Larry Ellison. In 2008, Laffer joined the Board of Alpha Theory, a non-public Fundamental Portfolio Optimization software for hedge and mutual funds. Laffer recently joined the advisory board of Collabarium Capital. In 2010, Laffer joined the Boards of Executive Trading Solutions, an LLC providing the top technological solution for management of Rule 10b51 stock trading plans, and Consensus Point, a provider of an enterprise prediction markets platform. In 2015, Laffer joined the board of General Employment Enterprises, (JOB), a rapidly growing staffing company located in Illinois. Laffer has branched into writing