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
To each according to his contribution to his needs". Lenin wrote "The State and Revolution" to answer all the burning questions of the movement, and to prevent Marxism from becoming tainted by "opportunists" and "reformists", as he called them. The work is very important as it categorizes the "first phase of communist society" as socialism, with the higher phase being communism proper. The pamphlet also answers all questions and concerns of the Marxists of his time by utilizing the classic works of Marxism. When he is set to describe socialism and its economic features he turns to the authority of Marx, especially the "Critique of the