“…One of the core issues of GPP practice is to explore why and how public sectors can better implement GPP (Sönnichsen and Clement, 2020). Most existing studies focus on the internal factors that motivate organizations to better practice GPP (Grandia and Voncken, 2019), such as knowledge (Liu et al, 2019a;Testa et al, 2016), training (Aragão and Jabbour, 2017), top management support/transformational leadership (Walker and Brammer, 2016), larger organizations (Testa et al, 2012) and higher administrative levels (Liu et al, 2019b). However, obstacles to GPP (Delmonico et al, 2018;Walker et al, 2008), such as cost/budget issues (McMurray et al, 2014), priority conflicts (Brammer and Walker, 2011) and supplier acquisition issues (Dou et al, 2014), make it difficult for public sectors to rely on internal motivation to better implement GPP (Alhola et al, 2019).…”