See, e.g., How Much Does a Belief Cost? Revisiting the Marketplace of Ideas, Gregory Brazeal, Southern California Interdisciplinary Law Journal, vol. 21 no. 1, p. 1 (2011); The Competition of Ideas: Market or Garden?, Robert Sparrow & Robert Goodin, Critical Review of International Social and Political Philosophy, vol. 4 no. 2, p. 45 (2001); Speech, Truth, and the Free Market for Ideas, Alvin I. Goldman & James C. Cox, Legal Theory, vol. 2, p. 1 (1996).