Relative clauses (RCs) at the right edge of partitive DPs tolerate a curious variability in agreement possibilities when the partitive is headed by one.1 I refer to the apparently anomalous singular agreement as agreement mismatch in partitive relatives (AMPR).2
I adopt the view that partitive DPs have a silent head noun that is (optionally) elided under identity with the post-prepositional NP (see, e.g., Jackendoff 1977, Cardinaletti and Giusti 1992, Zamparelli 1995, Sauerland 2004), and hereafter I will refer to the elided NP in (2) as the partitive-head NP, and the post-prepositional NP in (2) as the domain NP. In bracketed representations, I will indicate the partitivehead NP with superscript I and the domain NP with superscript II.3
Given (2), the chief interest of AMPR is that singular agreement in the RC is possible...