Introduction: parameters in minimalist theory; 1. A deletion analysis of null subjects; 2. Null subject parameters; 3. Control into finite clauses in partial null-subject languages; 4. Semi null-subject languages, expletives and expletive pro reconsidered; 5. The null generic pronoun in Finnish: a case of incorporation in T; 6. 'Free' inversion in romance and the null subject parameter; 7. Subjects, tense and verb-movement; 8. Varieties of French and the null subject parameter.