The papers in this volume are contributions to a comparative semantics, understood in the context of the theory of Logical Form as a branch of comparative syntax. In contrastively exploring a wide range of languages, including Arabic, Chinese, English, Hungarian, Italian, Japanese, Navajo, Spanish and Toba Batak, the authors provide new insights into our understanding of the nature of quantificational, WH and anaphoric phenomena, and into the form of constraints, including subjacency and ECP, on the structure of binding at Logical Form.