“…More recently, many other leading economists have made supporting statements - Blaug (2000) cites the examples of Paul Samuelson, Milton Friedman, James Tobin, James Buchanan, and Robert Solow. Ramsey (1927), who had been mentored by Pigou (see Pigou (1928)), published his rule for avoiding excess burdens in taxation, which is that taxes should be inversely proportional to elasticities, whether of supply or demand. This rule leads directly to capital as the worst tax base (Judd (1985), Chamley (1986)), because of its infinite long-run elasticity (this includes the possibility of capital flight in an open economy), and land as the best tax base, because of its zero long-run elasticity.…”