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Hillman, A. L., Katz, E., (1984). Risk-averse rent seekers and the  social cost of monopoly power. The Economic Journal, 104-110.  Hillman, A. L., Riley, L. and  J. G., (1989). Politically G. Riley (1989), "Politically  contestable rents and transfers{*}. transfers",  Economics \& Politics 1 (1), and Politics, 1(1):  17-39. Hillman, A.R. (2013), Rent seeking, in Reksulak, M., L. Razzolini, W. F. Shughart II (eds), The Elgar Companion to Public Choice, 2nd edition, Edward Elgar Publishing, pp. 307-331.