TY - CONF TI - 33 years of Lean Construction research: academia-industry links and global contributions C1 - Singapore, Singapore C3 - Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34) SP - 1028 EP - 1039 PY - 2026 DO - 10.24928/2026/0156 AU - John, Paul Christian AU - Sun, Bernard AU - Engebø, Atle AU - Lædre, Ola AU - Haghsheno, Shervin AU - Drevland, Frode AD - PhD Student, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany, christian.john@kit.edu, orcid.org/0009-0005-0648-9331 AD - Student, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany, bernard.sun@student.kit.edu, www.orcid.org/0009-0003-8624-7927 AD - Researcher, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, atle.engebo@ntnu.no, orcid.org/0000-0002-5293-0176 AD - Professor, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, ola.laedre@ntnu.no, orcid.org/0000-0003-4604-8299 AD - Professor, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany, shervin.haghsheno@kit.edu, orcid.org/0000-0002-0602-6370 AD - Associate Professor, Norwegian University of Science and Technology (NTNU), Trondheim, Norway, frode.drevland@ntnu.no, orcid.org/0000-0002-4596-1564 ED - Hamzeh, Farook ED - Poshdar, Mani ED - Garcia-Lopez,, Nelly P. AB - This paper presents a quantitative analysis of institutional and geographical participation in Lean Construction (LC) research as reflected in the International Group for Lean Construction (IGLC) proceedings over a 33-year period (1993–2025). Based on a dataset of all 2,413 conference papers, the study examines (i) the affiliation composition of papers (academia-only, mixed, industry-only), (ii) the most contributing organisations and countries, and (iii) patterns of (inter)national co-authorship. Results show that 65% of papers are authored exclusively by academia-affiliated authors, 27% are co-authored by academia and industry, and 9% are authored exclusively by industry. Country participation broadens over time, reaching contributions from 58 countries by 2025, while publication activity remains concentrated in a relatively small set of organisations and countries. At the continental level, Europe accounts for the largest share of contributions, followed by North America and South America. International co-authorship has also increased over time: internationally co-authored papers account for 21% of the full period and exceed 20% in most years since 2015, peaking at 37% (2021). Overall, the study provides a descriptive baseline of the institutional and national contexts from which LC research at IGLC primarily originates and of how cross-domain and cross-country collaboration is reflected in the conference. KW - Research KW - collaboration KW - practitioners KW - organisations KW - countries. PB - T2 - Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34) DA - 2026/06/22 CY - Singapore, Singapore L1 - http://iglc.net/Papers/Details/2472/pdf L2 - http://iglc.net/Papers/Details/2472 N1 - Export Date: 19 June 2026 DB - IGLC.net DP - IGLC LA - English ER -