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Carpenter , vice president for defense and foreign policy studies at the Cato Institute , and Kislitsyn , a former research assistant at Cato , show that the danger of armed conflict between Hungary and Serbia is particularly serious , because of Belgrade 's continuing mistreatment of Hungarian citizens in the Serbian province of Vojvodina . How long do you think a research fellow at Cato would last if s / he started questioning free-market orthodoxy ?