Book excerpt: In Dynamics of Morphological Productivity, Francesco Gardani explores the evolution of the productivity of the noun inflectional classes of Latin and Old Italian, covering a span of almost 2,000 years – an absolute novelty for the theory of diachrony and for Latin and Italo-Romance linguistics. By providing an original set of criteria for measuring productivity, based on the investigation of loanword integration, conversions, and class shift, Gardani provides a substantial contribution to the theory of inflection, as well as to the study of the morphological integration of loanwords. The result is a wealth of empirical facts, including data from the contact languages Etruscan, Ancient Greek, Germanic, Arabic, Byzantine Greek, Old French and Provençal, accompanied by brilliant and groundbreaking analyses.