Optimal tax the optimum. Stipulating this condition results in the following formula for the optimal top tax rate, if incomes are Pareto distributed: formula_1 where: Empirical estimation of the parameters of this equation suggests that the revenue-maximising top tax rate is between approximately 50% and 80%, although this estimate neglects long-run behavioural responses, which would imply higher elasticities and a lower optimal tax rate. Saez's analysis can also be generalised to tax rates other than the top rate. In the late 1970s, Arthur Laffer developed the Laffer curve, which demonstrates that there are two effects of changing tax rates: an arithmetic effect—if
From each according to his ability, to each according to his needs From each according to his ability, to each according to his needs "From each according to his ability, to each according to his needs" is a slogan popularised by Karl Marx in his 1875 "Critique of the Gotha Program". The principle refers to free access and distribution of goods, capital and services. In the Marxist view, such an arrangement will be made possible by the abundance of goods and services that a developed communist system will produce; the idea is that, with the full development of socialism and unfettered productive forces, there will be enough to satisfy everyone's needs. The