Capital in the Twenty-First Century

by Thomas Piketty

The second conclusion that emerges clearly from Table 12.2 is that the return increases rapidly with size of endowment. For the 500 of 850 universities whose endowment was less than $100 million, the average return was 6.2 percent in 1980–2010 (and 5.1 percent in 1990–2010), which is already fairly high and significantly above the average return on all private wealth in these periods.26 The greater the endowment, the greater the return. For the 60 universities with endowments of more than $1 billion, the average return was 8.8 percent in 1980–2010 (and 7.8 percent in 1990–2010). For the top trio (Harvard, Yale, and Princeton), which has not changed since 1980, the yield was 10.2 percent in 1980–2010 (and 10.0 percent in 1990–2010), twice as