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.
Notional Defined Contributions Notional Defined Contributions The term Notional Defined Contributions or Non-financial Defined Contributions or NDC refers to type of public pension system in which contributions made by the public behave in similar way they would in most public funds. This system is implemented in several countries in Europe such as Latvia, Poland, Italy and Sweden. NDC is in many ways similar to classical PAYG pension scheme. Working age individuals contribute to the system and pay for the benefits of current retirees. However, NDCs are different when it comes to determining the size of the benefits. For each individual the amount contributed