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Werner Hans Erhard (born John Paul Rosenberg September 5 1935) is an author of transformational models and applications for individuals groups and organizations. (1971–1975) est an educational corporation (1975–1981) and Werner Erhard & Associates (WEA 1981–1991). In 1991 Erhard retired from business sold his then-existing intellectual property to a group of his former employees (who formed Landmark Education).