Morphological complexity and Input Optimization

In this paper, we examine morphological complexity through the lens of Input Optimization. We take as our starting point the dimensions of complexity proposed in Anderson (2015). Input Optimization is a proposal to account for the statistical distribution of phonological properties in a constraint-based framework. Here we develop a framework for extending Input Optimization to the morphological domain and then test the morphological dimensions Anderson proposes with that framework. The dimensions we consider and the framework we develop are both supported by empirical tests in English and in Welsh.