This fourth volume of Catalan Journal of Linguistics  is devoted to a topic discussed at length in the literature but which nevertheless remains a challenge for any view of phonology: the morphology-phonology interaction. The papers collected address two related issues, the role of morphological information in phonology and the role of phonological information in morphology.
The contributions to this volume raise many interesting questions concerning morphophonemics from different points of view. In the articles some answers to these questions are suggested. One is the search for a more restrictive and coherent grammar to account for alternations. Another one is the existence of certain symmetries between the morphological and the prosodic/phonological level. Yet another one is the role of paradigms and subparadigms (patterns and subpatterns) in phonology and morphology. Unavoidably many other questions remain unresolved and have to be left for future research: What are the consequences of Freedom of Analysis and of Richness of the Base in OT? How can we integrate and limit paradigms and subparadigms in a particular linguistic analysis? Hopefully, this volume sets out further paths to explore.

The contributions in this volume collectively address several persistent challenges in the analysis of partitivity, such as (i) the semantic underspecification of partitive markers, which are not always transparently associated with the part–whole relation; (ii) the connection between partitive markers and indefiniteness and negation; (iii) the diachronic development of partitive markers and their relation to other categories, such as determiners and prepositions; and (iv) the syntactic structure of binominal constructions. Overall, we hope that these contributions advance our understanding of the many empirical and theoretical problems that partitivity poses for linguistic theory.

This issue of Catalan Journal of Linguistics contains a selection of nine contribu-tions that were presented at the workshop “Nominal inflection and word-formation at the phonology-morphology interface” (NoWPhoMo), which took place in early 2024 at the Universitat de Barcelona (January 25) and at the Universitat Autònoma de Barcelona (January 26), as part of the coordinated research project Native and non-native phonology: Language contact effects and interaction with other com-ponents of grammar, PID2020-113971GB-C21 and PID2020-113971GB-C22. The edition of the volume was handled by project PID2020-113971GB-C22.