Book excerpt: The Talmudic discussion in this passage (Bava Batra 20b-22a) lays the groundwork for many core principles of Jewish business ethics. The passage delves into both the good side and the dark side of competition--in business as well as in professional relationships. It begins by focusing on zoning practices within courtyards in ancient cities. The discussion evolves into both a history of Jewish education and an examination of the limitations that should be placed on a free-market economy to ensure that competition is fair and just. Talmud with Training Wheels: Courtyards and Classrooms wraps this Talmudic passage in a set of contemporary case studies, moving between ancient and contemporary dilemmas.