Laffer curve at an intermediate rate of taxation, and then falls again to zero revenue at a 100% tax rate. However, the shape of the curve is uncertain and disputed among economists. Under some assumptions, such as revenue being a continuous function of the rate of taxation, the maximum illustrated by the Laffer curve is a result of Rolle's theorem, which is a standard result in calculus. One implication of the Laffer curve is that reducing or increasing tax rates beyond a certain point is counter-productive for raising further tax revenue. A hypothetical Laffer curve for any given economy can only be
To each according to his contribution so, "accordingly, the individual producer receives back from society — after the deductions have been made — exactly what he gives to it". He explains this as: In the paragraph immediately following Marx continues to explain how this system of exchange is related to the capitalist system of exchange: Marx says that this is rational and necessary, and that once society advances from the lower phase of communist society and work becomes life's prime want, distribution will occur along different lines. During the higher phase of communism, the standard shall be "from each according to his ability, to each according