Paul-Bernd Spahn
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Paul-Bernd Spahn (born October 17, 1939) is the author of a study "On the feasibility of a Currency Transaction Tax," which has gained widespread attention. Its proposal, the Spahn tax, is a modification of the Tobin tax.
Spahn, a professor of finance theory at the University of Frankfurt, Germany, has modified James Tobin's suggestion in that he, Spahn, thinks such a tax should have two tiers.
There would be a low (perhaps even zero) rate for normal currency exchange, and a higher normalization duty that would kick in during periods of high currency volatility.
