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Former Bolivian President Gonzalo Sanchez de Lozada delivers a 2002 speech at the Congress in La Paz, Bolivia. Pablo Aneli/AP

The list of corporate sponsors of expense-paid judicial education seminars hosted by George Mason University’s Law & Economics Center in years past includes the names of such blue-chip companies as AT&T Inc., the Coca-Cola Co., Exxon Mobil Corp., Pfizer, Inc. and Wal-Mart Stores, Inc.