This volume addresses several aspects of the syntax and semantics of Romance Languages from the constraint-based, lexicalist perspective of Head-Driven Phrase Structure Grammar (HPSG). The papers in this volume not only broaden the empirical coverage of HPSG, but also discuss the significant implications of Romance languages for the development of HPSG theory. Among the critical topics discussed in this book are: bounded and unbounded dependency constructions, argument structure, the syntax and semantics of quantification, null complements, missing object constructions, cliticization, and the syntax and semantics of nominal expressions.