This volume presents a collection of in-depth cross-varietal studies on a broad spectrum of grammatical features in English varieties spoken all over the world. The contributions explore the structural unity and diversity of New Englishes and thus investigate central aspects of dialect evolution and language change. Moreover, this volume offers new insights into the question as to what constrains new dialect formation, and examines universal trends across a wide range of contact situations. The contributions in this volume further study the possibilities and limitations of quantitative and qualitative corpus analyses in comparative studies of New Englishes and exemplify novel approaches, e.g. the contribution of syntactic corpus annotation (tagging and parsing) to the description of New English structures; the use (and limitations) of web-derived data as an additional source of information; and the possibility to complement corpus data with evidence from sociolinguistic fieldwork.