“…Relevant policies include demand-side instruments (public procurement, 'green' infrastructure investment), supply-side instruments (financial subsidies to infant industries, skills and qualifications, public R&D) and support of knowledge exchange via such 'horizontal platforms'. Analyses of green-tech clusters in metropolitan areas (Marra, Antonelli, & Pozzi, 2017) and industrial regions (Tödtling, Höglinger, Sinozic, & Auer, 2014) provide support for the view that cross-industrial knowledge circulation and policies aiming to facilitate such flows are superior to traditional cluster approaches. These studies also point to the significance of other policy measures like environmental standards, public demand and procurement (Tödtling et al, 2014) and examine the gradual transformation of green-tech clusters into open cross-industry platforms that combine competences, specializations and capabilities from several industries, such as software, transportation, analytics, construction and biotechnology (Marra et al, 2017).…”