Research by Kristin Forbes of the Massachusetts Institute of Technology and Marcel Fratzscher, Thomas Kostka and Roland Straub of the European Central Bank has assessed the impact of Brazilian taxes on foreign purchases of fixed-income assets between 2006 and 2011.

ECONOMIST: Free exchange

The daughter of university professors, Ms Berenson broke off her studies at the Massachusetts Institute of Technology in Boston to travel to Central and South America.

BBC: Peru frees US 'rebel' Lori Berenson after 15 years