**The analysis presented in the poster is substantially revised from the version in the abstract.**
This work investigates the semantics of anaphoric comparatives (i.e.
comparatives used without an overt standard phrase) in English. The
empirical puzzle, building on the observation in Hardt and Mikkelsen
(2015), is the following: sensitivity to the clausal content is observed on
certain anaphoric comparatives (e.g. English "same" and "more"/"less" in
amount comparatives ), but not on others (e.g. "more"/"different" in "a
more interesting/different book"). A novel dynamic semantics of the
comparative is built to account for these data.