The articles of this collection cover a wide range of formal syntactic and semantic phenomena. The focus is on a broad array of developmental syntactic phenomena, including topics in Argument Structure and Clause-Internal Syntax, the DP Domain and Learning Theory. In total, the contents of the volume illustrate ways in which theoretically informed linguistic research can explain language behavior in terms that are motivated on independent grounds and point towards new research opportunities to test theoretical claims about the adult model of grammar. The contributions of this volume are inspired by or related to the scholarship of Nina Hyams, whose dedication to rigorous, theoretically-informed research on language is well represented here.