Steven Horwitz at Coordination Problem has a wonderful post about a new study (pdf) by Robert Carroll of the Tax Foundation on income mobility and inequality:
In all, over the 1999 through 2007 period, about 675,000 taxpayers earned over a $1 million for at least one year. Of these taxpayers, about 338,000 (50 percent) were a millionaire in only one year, while just 38,000 (6 percent) remained a millionaire in all nine years. Based on these results, it is clear that taxpayers move in and out of millionaire status with great frequency....
Carroll uses a nice analogy from Schumpeter that I'd never heard before: the distribution of income is like a hotel with some really fancy rooms on the top floors and some very basic ones on the bottom. All the rooms are always full, but who occupies which rooms changes from year to year.
Something to think about the next time a tax increase on "millionaires" is proposed.
