Tax policy is the government's approach to taxation. An income tax is a tax levied on the financial income of people, corporations, or other legal entities. Various income tax systems exist, with varying degrees of tax incidence. Among the topics discussed in this book include the tax deduction policy, which has a strong impact on residential mobility, and the proportional hazard model which investigates the effect of the income tax deduction policy in Japan that influences residential moves. This book also empirically investigates the tax-evasion induced saving hypothesis, which holds that at least some portion of the population engages in tax evasion and that tax evasion itself induces at least some increase in aggregate saving. Also examined are the general equilibrium effects of tax policies when there is a mandated minimum wage, the extension of the neoclassical growth model with productive public capital, and the causes and consequences of various types of property tax limitations are reviewed.