Sir - It is correct that the impact of emigration on a migrant's country of origin is not all bad (Economics focus, May 28th). The loss of graduates who have been trained through the public purse may be offset by greater skills among returning migrants, remittances, an ambassadorial support role from expatriates, and so on. But you overstated the novelty of these ideas and did not pay much attention to the political subtexts.
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