Fell bundles and imprimitivity theorems: towards a universal generalized fixed point algebra S. KaliszewskiPaul MuhlyJohn QuiggDana Williams 46L55imprimitivity theoremFell bundlegroupoid We apply the One-Sided Action Theorem from the first paper in this series to prove that Rieffel's Morita equivalence between the reduced crossed product by a proper saturated action and the generalized fixed-point algebra is a quotient of a Morita equivalence between the full crossed product and a "universal" fixed-point algebra. We give several applications to Fell bundles over groups, reduced crossed products as fixed-point algebras, and $C^{*}$-bundles. Indiana University Mathematics Journal 2013 text pdf 10.1512/iumj.2013.62.5107 10.1512/iumj.2013.62.5107 en Indiana Univ. Math. J. 62 (2013) 1691 - 1716 state-of-the-art mathematics http://iumj.org/access/