The aim of this paper is to examine the concentration of wealth among the group of top wealth holders, defined as those … with wealth in excess of a high cut off. The paper begins by considering the definition of this cut off, analogous to the …, wealth tax data, and investment income tax data. It starts off from the world’s billionaires in 2006, but is particularly …

the relationship with wealth at death, on the form of the bequest, and on the different causes to which people bequeath. …