Note that the precise conclusions depend quite heavily on the years chosen for consideration. For example, if we look at the period 1990–2010 instead of 1987–2013, the real rate of growth of the largest fortunes drops to 4 percent a year instead of 6 or 7.4 This is because 1990 marked a peak in global stock and real estate prices, while 2010 was a fairly low point for both
