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Alvaredo, F., Atkinson, A.B., Picketty, T. and Saez, E. (2013) ‘The top 1 percent in international and historical persective’, The National Bureau of Economic Research. Available at: https://www.nber.org/papers/w19075 [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] (Accessed: 30 March 2020).