1. GOAL: This paper puts forward a unitary account for a series of object agreement asymmetries in Romance by parametrizing the vP field. Adopting a microparametric perspective (Belletti & Rizzi 1996, Biberauer 2008, Fukui 1986, Kayne 2000, 2005, Roberts 2010, a.o.), and following numerous precedents on this topic (Koizumi 1993, Johnson 1991, Lasnik 2003, Torrego 1995, 1999, Lopez 2012), we cla...