Laffer gets it entirely wrong (June, 2009):

[Benton D Struckcheon]

Written at more or less the precise bottom. Of course, no one will ever call him on this complete hogwash:

http://online.wsj.com/news/articles/SB124458888993599879

[Warpy]

1. That napkin should have been thrown out with the rest of the dinner detritus

The Laffer curve only worked when the tax rate was above 90%.

[Jim Lane]

2. He's admitted he was wrong.

See the recent interview in this thread.

Imagine, a right-wing economist consults his model, makes a prediction, sees his prediction crash and burn -- and says the fault is with the model. We need a lot more of that.

[Fuddnik]

3. Was the model Jenny McCarthy?

[bemildred]

4. That was always known to be horseshit.

Not being reality-based started to come into its own in US politics right about then. The politicos stopped caring about making sense, "spout the talking points the guy just handed you" is how it goes now.