The taxation of the local income of one country's residents by another country will drain resources from the host country. Furthermore, the inability of individuals to invest or properly plan for retirement will lead to inefficient outcomes both for the individual and consequently for the social safety net of their host country.
The purpose of this page is to collect statistics on these effects.
General / Global effects
This would be a good place for statistics like the global size of the managed fund industry (PFICs).