We explore the interaction between two facts. The first is that income is variable; the second is that the tax and transfer system transforms before tax income into after tax income in highly non-linear ways. The effect is to penalize (and reward) income variability in a manner which is both...

Tax and transfer programs transform before-tax income into after-tax income. Income is variable and the tax and transfer system is nonlinear-i.e., marginal tax rates vary. We show that, as a consequence, the tax and transfer system punishes (and rewards) income variability. We calculate the...

We explore the interaction between two facts. The first is that income is variable; the second is that the tax and transfer system transforms before tax income into after tax income in highly non-linear ways. The effect is to penalize (and reward) income variability in a manner which is both...