Arash Abizadeh. "Liberal Egalitarian Arguments for Closed Borders: Some Preliminary Critical Reflections." Ethics & Economics 4.1 (2006).
Abstract: There are at least five important arguments for why liberal egalitarianism permits states, under today's circumstances, to close their borders to foreigners: the public order, domestic economy, social integration, political threat, and domestic welfare arguments. Critical examination of these arguments suggests that liberal egalitarianism, rather than supporting a right to close one's borders to foreigners, mandates borders considerably more open than is the practice of today's self-styled liberal states.
(c) 2006 Arash Abizadeh