Proportionality in private law Proportionality is a ubiquitous concept in law. While mostly associated with fundamental rights review it also plays an important role in private law. In this context proportionality requirements can be the result of both traditional private law reasoning and the influence of constitutional law. The present volume aims to explore different forms and functions of proportionality in selected private law contexts and jurisdictions. The contributions cover constitutional and theoretical underpinnings of proportionalitys role in private law as well as specific examples of how proportionality affects private law in different areas and across different jurisdictions. They include perspectives on German and US American private procedural and constitutional law as well as a special focus on the European dimension.Survey of contentsBen Köhler: Proportionality in Private Law: A Primer – Franz Bauer: Proportionality in Private Law: An Analytical Framework – Victor Jouannaud: The Various Manifestations of the Constitutional Principle of Proportionality in Private Law – Philip M. Bender: Private Law Adjudication versus Constitutional Adjudication – Proportionality between Coherence and Balancing – Nicolás Parra Herrera: Three Approaches to Proportionality in American Legal Thought: A Genealogy – Johanna Stark: Rights and Their Boundaries in European Contract Law: Abuse Proportionality or Both – Luc Desaunettes Barbero: Proportionality and IP Law – Toward an Age of Balancing – Sorina Doroga: The Use of Public Policy Clauses for the Protection of Human Rights in the EU and the Role of Proportionality – Wiebke Voß: Proportionality in Civil Procedure: A Different Animal – Guy Rubinstein: The Influence of Proportionality in Private Law on Remedies in American Constitutional Criminal Procedure