o:35720 Is There a Trade-off Between Sustainability and Competition Goals in Public Procurement? Evidence from Slovenia en Abstract Over the past decade, public procurement goals have expanded from obtaining free competition and lowest prices to achieving objectives of “horizontal” policies that take into account ecological and social aspects. However, the Tinbergen Rule states that one instrument should be matched with one goal, while using one instrument for achieving multiple goals would undermine its effectiveness. In this paper, we will examine whether implementation of “horizontal” public procurement policies related to green public procurement, socially responsible public procurement and the promotion of micro, small and medium enterprises ’ participation affect achievement of the “primary” public procurement goal of free competition. Our study is based on empirical data on more than 65,000 public procurements carried out in Slovenia during the period 2016-2019. Keywords: • horizontal policies • competition • green public procurement • socially responsible public procurement • sustainable development goals 1552101 1581-5374 1552099 10.4335/22.1.49-70(2024) 2025-01-21T13:07:14.464Z 44 no 46 Predrag Jovanović Milan Radojičić person Dejan Molnar Univerzitet u Beogradu Ekonomski fakultet person 0000-0002-6081-8141 Sašo Matas person application/pdf 723431 https://phaidrabg.bg.ac.rs/o:35720 no yes 18 70 1552253 11A03 Lex localis - Journal of Local Self-Government 22 1 49 70 2024