Before revision:  A corollary establishes that Slutsky-symmetry, a key condition for previous rationalizability results (Daly-Zachary 1978, Armstrong-Vickers 2015), is equivalent to absence of income-effects.
After revision:  A corollary shows that Slutsky-symmetry, a key condition for previous rationalizability results (Daly-Zachary 1978, Armstrong-Vickers 2015), is equivalent to absence of income-effects.