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 each according to his contribution "To each according to his contribution" is a principle of distribution considered to be one of the defining features of socialism. It refers to an arrangement whereby individual compensation is reflective of one's contribution to the social product (total output of the economy) in terms of effort, labor and productivity. This is held in contrast to the method of distribution and compensation in capitalism, where those who own private property receive unearned income in the form of interest, rent, or profit by virtue of ownership irrespective of their contribution to the social product. This