Proceedings of the 2nd International Workshop on Learning to Quantify (LQ 2022)

The 2nd International Workshop on Learning to Quantify (LQ 2022 - https: //lq-2022.github.io/) was held in Grenoble, FR, on September 23, 2022, as a satellite workshop of the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD 2022). While the 1st edition of the workshop (LQ 2021 - https://cikmlq2021. github.io/, which was instead co-located with the 30th ACM International Conference on Information and Knowledge Management (CIKM 2021)) had to be an entirely online event, LQ 2022 was a hybrid event, with presentations given in-presence and both in-presence attendees and remote attendees. The workshop was a half-day event, and consisted of a keynote talk by Marco Saerens (Universit ?e Catholique de Louvain), presentations of four con- tributed papers, and a final collective discussion on the open problems of learning to quantify and on future initiatives. The present volume contains the four contributed papers that were ac- cepted for presentation at the workshop. Each of these papers was submitted as a response to the call for papers, was reviewed by at least three members of the international program committee, and was revised by the authors so as to take into account the feedback provided by the reviewers. We hope that the availability of the present volume will increase the interest in the subject of quantification on the part of researchers and practitioners alike, and will contribute to making quantification better known to potential users of this technology and to researchers interested in advancing the field.