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The économie des conventions (economics of convention, EC) can be regarded as an influential transdisciplinary, pragmatic approach for the historical analysis of economic coordination and economic institutions. EC was developed first in France. For some years now international recognition and reception is rising. Historical Social Research/Historische Sozialforschung has published contributions about EC and applications of EC since 2009. In the present issue ongoing and critical discussion is presented, which addresses problems of institutional theory, methodology and conceptual aspects of EC. Furthermore, contributions are entailed in this issue, which apply EC as a transdisciplinary historical approach to new research objects. Also new perspectives for conceptual and methodological developments of EC are offered.Christoph Classen, Susanne Kinnebrock &#38; Maria Löblich (Eds.): Towards Web History: Sources, Methods, and Challenges in the Digital Age.The process of digitization represents a twofold challenge both for historiography in general and, in particular, for historical communication research. Digitization has deeply changed research practice as well as the inter-disciplinary communication and is likely to do so in future. The contributions of this HSR Focus address a twofold conceptual challenge. In a first part, problems and chances of a contemporary history of digital media are discussed. In the second part the authors leave the level of conceptual considerations and turn towards the already established practice of digitization and the supply of sources in the net.Furthermore this HSR contains a Mixed Issue with nine articles.Focus I: The Économie des ConventionsRainer Diaz-Bone &#38; Robert Salais: The Économie des Conventions – Transdisciplinary Discussions and Perspectives. Introduction to the HSR Focus. [Abstract]Christian Bessy: Institutions and Conventions of Quality. [Abstract]Laurent Thévenot: Convening the Company of Historians to go into Conventions, Powers, Critiques and Engagements. [Abstract]Jürgen Kädtler: On Conventions, Institutions, Power, and Uncertainty – Some Cursory Remarks. [Abstract]Bert De Munck: Conventions, the Great Transformation and Actor Network Theory. [Abstract]Robert Salais: Quantification and the Economics of Convention. [Abstract].Rainer Diaz-Bone: Elaborating the Conceptual Difference between Conventions and Institutions. [Abstract] Claire Judde de Larivière: The ‘Public’ and the ‘Private’ in Sixteenth-Century Venice: From Medieval Economy to Early Modern State. [Abstract] &#160;Focus II: Towards Web HistoryChristoph Classen, Susanne Kinnebrock &#38; Maria Löblich: Towards Web History: Sources, Methods, and Challenges in the Digital Age. An Introduction. [Abstract]Niels Brügger: When the Present Web is Later the Past: Web Historiography, Digital History, and Internet Studies. [Abstract]Christian Schwarzenegger:Exploring Digital Yesterdays – Reflections on New Media and the Future of Communication History. [Abstract]Christian Oggolder:  Inside – Outside. Web History and the Ambivalent Relationship between Old and New Media. [Abstract]Albrecht Hoppe &#38; Rudolf Stöber: Amtspresse in Preußen. Zur Erschließung der Provinzial-Correspondenz und Neuesten Mittheilungen. [Abstract]Patrick Rössler, Achim Bonte &#38; Katja Leiskau: Digitization of Popular Print Media as a Source for Studies on Visual Communication: Illustrated Magazines of the Weimar Republic. [Abstract]Mixed Issue: ArticlesJarg Bergold &#38; Stefan Thomas: Participatory Research Methods: A Methodological Approach in Motion. [Abstract]Franz Breuer: Predecessor-Successor Transitions in Institutional and Interpersonal Contexts: On the Development of a Theory of Transfer of Personal Objects. [Abstract]César A. Cisneros Puebla &#38; Judith Davidson: Qualitative Computing and Qualitative Research: Addressing the Challenges of Technology and Globalization. [Abstract]Rainer Schützeichel: Verstehen in professionalen Interaktionen. [Abstract]Ann-Mari Sellerberg &#38; Vesa Leppänen: A Typology of Narratives of Social Inclusion and Exclusion: The Case of Bankrupt Entrepreneurs. [Abstract]Evangelina Baralou, Patricia Wolf &#38; Jens O. Meissner: Bright, Excellent, Ignored: The Contribution of Luhmann’s System Theory and Its Problem of Non-Connectivity to Academic Management Research. [Abstract]Claude Diebolt: Where Are We Now in Cliometrics? [Abstract]Anne Reimat: Old Age Pensions, Demography and Economic Growth in the Long Run: The French Case Revisited. [Abstract]Patricio Sáiz: Social Networks of Innovation in the European Periphery: Exploring Independent versus Corporate Patents in Spain circa 1820-1939. [Abstract]&#160;