The paper uses a combination of micro-level datasets to document the rise of income polarization - what some have referred to as the 'hollowing out' of the income distribution - in the United States, since the 1970s. While in the initial decades more middle-income households moved up, rather...

We compile data spanning the period 1900-2014 and up to 30 countries to study long-run patterns in the tax elasticity of top incomes. Our results show that top tax elasticities vary tremendously over time; they were medium-to-low before 1950, virtually zero during the postwar era up to 1980 and...