Laffer curve is simplistic in that it assumes a single tax rate and a single labor supply. Actual systems of public finance are more complex, and there is serious doubt about the relevance of considering a single marginal tax rate. In addition, revenue may well be a multivalued function of tax rate; for instance, an increase in tax rate to a certain percentage may not result in the same revenue as a decrease in tax rate to the same percentage (a kind of hysteresis). Furthermore, the Laffer curve does not take explicitly into account the nature of the tax avoidance taking place.
George Laffer George Laffer George Richards Laffer (14 September 1866 – 7 December 1933) was an Australian politician. He was member of the South Australian House of Assembly from 1913 until 1933, representing the electorate of Alexandra for the Liberal Union, and its successors the Liberal Federation and Liberal and Country League. He was a minister in the Barwell government, and was Speaker of the South Australian House of Assembly from 1927 until 1930. Laffer was born at Coromandel Valley into a fruit-growing family, his father having emigrated from Cornwall in 1840. He continued in the family business, and was actively involved