5 Boosting sustainability in public construction procurement implies new challenges associated with 6 incentivizing integrated approaches and inclusion of sustainability criteria in tendering procedures. 7 Thus, the choice of project delivery method and procurement procedure is a key decision to ensure 8 project success for sustainable outcomes. This study focuses on the social dimension of sustainability 9 and analyzes 451 tendering documents from 10 countries to assess the influence of

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... ment 10 procedures and delivery methods on the inclusion of social criteria in public construction 11 procurement. Content analysis, descriptive statistics, and logistic regression are applied. The results 12 show the international trends in delivery methods and procurement procedures. Country and 13 contract size are the most influential variables for inclusion of social criteria in tendering procedures. 14 There are no significant differences between project delivery methods and between procurement 15 procedures respect to the inclusion of social criteria. However, criteria associated with employment 16 and cultural heritage are mainly considered in traditional delivery methods, whereas professional 17 ethics and cultural heritage are associated with lowest-price procurement procedures. Finally, 18 subjective methods are predominantly used to assess social sustainability. 19 20