what this article is dancing around is that when Haiti gained its independence, it distributed its land amongst the freed slaves, and then, given the understandable lack of agricultural knowledge, over-farmed them to the point where today each plot of land produces about a quarter of the same plot in the DR
it does not. the article essentially says that the width of the distribution of land caused over-farming. too many people with little bits of land. it makes no direct mention of the brain drain that heavily enforced decolonisation will have brought about