<p>As I have a non-hypothetical job, I have to cut back on my comments to this discussion.</p>
<p>Just one response: The USSR example shows the importance of incentives, but that doesn't tell you anything about the impact of changes in marginal income tax rates in the US today. Why? It's case at the extremes and policy choices from pre-Clinton to Clinton to GW Bush involved relatively small changes in marginal income tax rates.</p>