• Prop. 8. If g imperfectly dominates f, then hβ(f,g) imperfectly dominates f. ... and yield a hierarchy of manipulability and efficiency. • Prop. 9./10. Given f SP, g manipulable and weakly less varying than f, g imperfectly dominates f, 0≤β<β‘≤1, then 1. hβ‘(f,g) is intensely and strongly more manipulable than hβ(f,g) 2. hβ‘(f,g) imperfectly dominates hβ(f,g). ... which preserve PSP, are comp...