Colonial extraction and unequal exchange have shaped two centuries of North-South inequality - WID - World Inequality Database
wid.world
In a new study, Gastón Nievas and Thomas Piketty examine patterns of global imbalances, current account surplus/deficit and net foreign wealth accumulation over more than two centuries.

linky to pdf (*advanced class of radlibs, however, is more receptive to piketty than obscure french marxist, so)