“…Moreover, it is supposed to be "a powerful instrument for stimulating innovations," according to the Commission of the European Parliament (2008, p. 9). There is a growing literature assessing the design of green public procurement and the barriers to its uptake (e.g., Edquist and Zabala-Iturriagagoitia, 2020;Hall et al, 2015;Rainville, 2017;Rossell, 2021). However, despite its high political priority, empirical studies on its impact are limited, focused on specific classes of environmental criteria, and targeted at the effect on environmental outputs and not innovation (for a review, see Cheng et al 2018).…”