Some simple analytics of slave redemption / Dean S. Karlan and Alan B. Krueger -- Slave redemption when it takes time to redeem slaves / Carol Ann Rogers and Kenneth A. Swinnerton -- Exploration of the worst forms of child labor : is redemption a viable option? / Arnab K. Basu and Nancy H. Chau -- Slavery, freedom, and sen / Stanley Engerman -- Freedom, servitude, and voluntary contracts / Jonathan Conning and Michael Kevane -- Slavery and slave redemption in the Sudan / Jok Madut Jok -- Dilemmas in the practice of rachat in French West Africa / E. Ann McDougall -- End of serfdom in Russia-- lessons for Sudan? / Lisa D. Cook -- Conflicting imperatives : black and white American abolitionists debate slave redemption / Margaret M. R. Kellow -- Frederick Douglass and the politics of slave redemptions / John Stauffer -- Moral quandary of slave redemptions / Howard McGary -- Next best thing / Martin Bunzl -- What's wrong with slavery? / Kwame Anthony Appiah -- Appendix, "They call us animals," testimonies of abductees and slaves in Sudan / Jok Madut Jok