The Laffer Curve is a conceptual model of taxation and government revenue developed by American economist Arthur Laffer in 1974. The concept, popularly known as the “Laffer Curve,” suggests that a progressive taxation system – one that involves increasing marginal tax rates – can reduce total tax revenue if it is set at a certain unbalanced level.

The Laffer Curve graphically reflects the premise that the relationship between rates of taxation and the resulting levels of government revenue is non-linear – meaning that an increase in taxation does not necessarily lead to a proportional increase in tax revenue. Using the Laffer Curve theory, if a government sets its tax rate at 0%, it will obviously not get any revenue. However, if the tax rate is set too high (e.g., 100%), this also reduces the incentive for people to work and invest, resulting in even less tax revenue. This ultimately shows that the peak in government revenue occurs somewhere in between 0% and 100%.

The Laffer Curve was used as a foundation for the Reagan administration’s supply-side economics approach to government taxation and fiscal policy in the 1980s. By lowering personal marginal tax rates, the Reagan administration hoped to stimulate economic growth and create dynamic effects in the marketplace. At the same time, Reagan’s criticism of the high tax-rates set by the Carter administration resulted in the classic Laffer Curve response – personal tax revenues did rise, but not as much as the increased economic activity resulting from the cut in tax rates.

However, many economists have argued that the Laffer Curve is too simplistic to be accurate. For one, the curve uses a single tax rate which does not capture the complexities of the marginal taxation system. Additionally, economists have found no solid evidence that tax cuts cause economic growth – and hence, an increase in tax revenue.

In conclusion, the Laffer Curve can be useful in helping governments understand the impact of taxation decisions on total tax revenue, but caution should be exercised in over-extrapolating the implications of a single theoretical model. Furthermore, effective taxation schemes should consider the psychological, economic, and moral incentives of various tax rates in order to maximize government revenue without discouraging production and investment.