Abstract
<jats:p>There is growing consensus in the field that purely morphological structures play a big role in how paradigms change through time. Morphological predictability relations by themselves are fundamental to explaining why unnatural patterns like morphomes exist and can become productive templates in analogical change. Although paradigmatic structure and change are old topics, they have recently become more popular again thanks to easier access to more data and to the tools and computational power to evaluate and compare whole inflectional systems at once. This chapter reviews traditional and newer insights and methods, and commonplace and less widely used datasets, and it suggests some directions in which the field is likely to move in the future.</jats:p>