Several studies indicate that increased labor mobility could bring about large economic benefits worldwide, and fully open borders could bring gains of between 67% and 122% of world GDP
(Clemens 2011) and dramatically reduce global poverty (Shulman 2014). Much of this increase would come via substantially increasing the wages of migrants from poorer countries, allowing them to earn more, and possibly sending remittances that will help their families or communities out of poverty. Clemens, Michael A. (2011) Economics and emigration: Trillion-dollar bills on the sidewalk? , Journal of Economic Perspectives , vol. 25, pp. 83–106. An attempt to estimate the economic losses caused by barriers to migration. Shulman, Carl (2014) How migration liberalization might eliminate most absolute poverty , Reflective Disequilibrium , May 27. A defence of the claim that the estimates about the effects of migration liberalization on absolute poverty is significantly more robust than the most extreme estimates of global output gains.