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...

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...

Recent econometric studies of the effect of taxes on charitable giving have called into question the behavioral parameters derived from cross-section models. In particular, these studies imply that taxes affect contributions primarily by influencing their timing, not their long-term levels. The...