The structure of null subject DPs and agreement in Polish impersonal constructions
This paper is concerned with the function of the SIĘ particle in the impersonal construction and with the internal structure of impersonal pronouns in Polish. It is proposed that SIĘ is a functional element heading its own projection, dubbed SIĘP, taking <i>pro</i> as its complement. This makes the SIĘP similar to canonical DPs. As for pronouns, it is argued that they enter the derivation as bundles of features that get bound by operators and logophoric categories in the course of the syntactic derivation. Differences in the interpretation of the null impersonal subject pronoun will depend on the kind of elements its sub-features will be bound by.