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.
The J Curve (book) The J Curve (book) The J Curve: A New Way to Understand Why Nations Rise and Fall (Simon & Schuster: 2006) is a book by political scientist Ian Bremmer. It was named a "Book of the Year" in 2006 by "The Economist". Bremmer's J Curve describes the relationship between a country's openness and its stability; focusing on the notion that while many countries are stable because they are open (the United States, France, Japan), others are stable because they are closed (North Korea, Cuba, Iraq under Saddam Hussein). According to Bremmer, a government's motivations differ dramatically depending on where they