Errata
1.  In.Figure 7.9a, p.171: The arrow should point from worker productivity to supervisor satisfaction rather than vice versa
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2.  In Figure 8.11, p.220: The title of the figure should read: Quadratic functions. (a) Function c + bX + aX2, with c = 0, b = .5; (b) function c + bX + aX2, with c = 0, b = –1.7