José M. Brucart is Professor of Spanish Linguistics at the Universitat Autònoma de Barcelona and has published extensively on the Spanish grammar. He is author of La sintaxis (with M.L. Hernanz) and La elipsis. Aspectos de la elisión sintáctica en español and has also contributed to the main reference grammars of Spanish and Catalan.Anna Gavarró obtained her PhD at the University of Edinburgh and icurrently lectures on linguistics at the Universitat Autònoma de Barcelona. She has published mostly on Romance and her work includes articles in Language Acquisition, Journal of Psycholinguistic Research, and Brain and Language, and a chapter in the reference grammar of Catalan.Jaume Solà has been an associate professor of Catalan Philology at the Universitat Autònoma de Barcelona since 1996. His main research interests are inflection and word order (as two crucial aspects of language variation), within the Principles and Parameters-Minimalism framework. He is editor-in-chief of Catalan Journal of Linguistics.