Chancellor points out that economists from Irving Fisher in 1929 to Ben Bernanke in the mid-1990's have often played the role of academic shills during each successive period of "This Time its Different, " claiming that there was some new event, technology, or innovation, that justified higher valuations of assets and higher institutional debt levels. He quotes Walter Bagehot who says about merchants and bankers of his day-" they fancy the prosperity they see will last always, that it is only the beginning of a greater prosperity." The significance of the book is that it suggests an hypothesis that is quite different from the general idea in 2011 that there won't be a protracted period of slow or marginal growth after a bubble of this nature. Because the bubble is also in other countries, in countries of the euro-zone, China, Turkey, Brazil, and other countries, the situation takes a much longer time to heal.