One year ago, I wrote about how the French government was getting unexpected additional revenues following the implementation of lower tax rates.

This is the Laffer Curve in action, and it's happening again in France, only this time because the government reduced the wealth tax.

Here's part of the story at Tax-news.com.

France’s solidarity tax on wealth (l’impôt de solidarité sur la fortune – ISF), which was radically reformed by the government in June last year, has served to yield much greater fiscal revenues for the state than initially predicted.

...[T]he government agreed that the solidarity tax on wealth would in future comprise of only two tax brackets: a 0.25% tax rate imposed on individuals with net taxable wealth in excess of EUR1.3m (USD1.7m), and a 0.5% tax rate levied on individuals with net taxable assets above EUR3m. Previously, the entry threshold at which wealth tax was applied was EUR800,000, with the rates varying between 0.55% and 1.8%. To alleviate any threshold effects, a discount mechanism was also instated applicable to wealth of between EUR1.3m and EUR1.4m, as well as to wealth of between EUR3m and EUR3.2m. Although the new provisions provide for lower tax rates and for the abolition of the first tax bracket, effectively exempting around 300,000 taxpayers from the tax, according to latest government figures, the tax yielded around EUR4.3bn in 2011, almost EUR60m more than originally forecast in the collective budget.

This is not to say that France is an example to follow. There shouldn't be any wealth tax, and income tax rates are still far too high.

And it's also worth remembering that tax policy is just one of many factors that determine economic performance.

That being said, nations that shift from terrible tax policy to bad tax policy will enjoy better economic performance, just as nations that go from good policy to great policy also will reap benefits.

In other words, incremental changes make a difference. That's even the case when the politicians impose a "Snooki tax" on indoor tanning services.

The most dramatic Laffer Curve effects, though, occur when there are big changes in policy. The video after the jump looks at some of the evidence.

This video is part of a three-part series, by the way. Click here if you want to see the entire set.