Morphology and linguistic typology. Papers from the Fourth Mediterranean Morphology Meeting, Catania, 22–24 September 2003 -- Morphological universals and diachrony -- Morphological universals and the sign language type -- Typology and the formal modelling of syncretism -- An inflectional approach to Hausa final vowel shortening -- Blocking and periphrasis in inflectional paradigms -- Morphol…