Productivity in Construction Morphology Claudio Iacobini -- University of Salerno (Italy) -- ciacobini@unisa.it Productivity is a central issue in Construction Grammar since constructional schemas can be defined in terms of (semi-)productivity, but so far little attention has been devoted to morphological productivity. Construction grammar is not mentioned among the relevant theories in the literature on morphological productivity (cf. Bauer 2005). Barðdal (2008) provides a significant contribution to the definition of productivity in a constructionist perspective, but focusing on the syntactic aspect of productivity. Although Construction Grammar provides a framework in which the commonalities of word level and phrase level constructs are highlighted, morphological productivity (i.e. the productivity of schemas at word level) shows some peculiarities with respect to syntactic productivity, since it is based on subschemas (i.e. schemas that are more specific in contrast to higher ranked, more general schemas) which may be abstracted from the paradigmatic relations of (more or less) idiomatic and conventionalized words and phrases present in the lexicon. The aim of this talk is that of giving a contribution to the improvement of the issue of morphological productivity in the framework of Construction Morphology as developed by Booij (2010) by showing that this theoretical approach allows a proper explanation of phenomena difficult to account in an output-oriented approach of productivity based on individual specific restrictions or constraints on affix ordering (cf. Plag 1991). The case studies presented here concern the revitalization of two prefixes (co- and auto-) of the Italian language and the recent recovery in productivity of a compound pattern N + V > V attested in the early stages of Romance languages but which has not been productive in Italian for centuries (e.g. capovolgere 1597 ‘to overturn’ videoregistrare 1985 ‘to videorecord’). The common feature of these cases is the resumption of productivity of processes that were available at the linguistic system level but not accepted in the norm until recent times. The degree to which the potential of these word-formation patterns is exploited varies diachronically. We argue that their actual higher degree of productivity cannot be accounted in terms of changes in the number of restrictions, but rather in terms of rearrangement of the paradigmatic relations between (sets of) complex words. Our analysis of the reasons of change in productivity of the cases investigated shows the limits of the idea of productivity as the inverse of the number of constraints applying to particular affixes, and shows that the basic tenets of Construction Morphology (namely, the claim that both individual complex words and abstract generalizing schemas are part of the lexicon; the hierarchical organization of the lexicon with layers of subgeneralizations linked through default inheritance; and, above all, the paradigmatic relations between (sets of) complex words) form a theoretical framework that allows to explain not only the systematic restrictions (which determine availability of coinage), but also the changes in the norm, which are at the root of the differences in the rentability of word formation processes, and hence of the changes in productivity in a diachronic perspective. Bibliographical References Barðdal, Jóhanna. 2008. 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