抄録
In this paper, I argue that infinitival complements of believe-class verbs are I's, although control infinitives not introduced by a complementizer are IPs, as argued by Boškovic (1996), in accordance with Law's (1991) Principle of Derivation of Economy. The suggested analysis accounts for a number of differences between control and non-control infinitives without distinguishing between control and non-control infinitives with respect to null Case-checking. Furthermore, I suggest that finite clauses not introduced by a complementizer are I's, demonstrating that their restricted distribution can be accounted for by means of a general constraint on movement.
