by Nadège Carlier, David Aubin, and Stéphane Moyson

In our recent article published in Policy & Politics as part of a special issue on Policy Learning: Types, Mechanisms and Effects, we researched the relative effects of diversity on collective learning in local collaborative networks in Belgium. Collaborative networks represent horizontal structures in public governance that facilitate interactions among diverse stakeholders, including civil servants, businesses, and citizens. These networks play a crucial role in fostering coherence, comprehensiveness, and innovation in cross-cutting public policies such as climate initiatives. However, achieving these benefits is particularly challenging in the aftermath of fragmented public action resulting from new public management reforms. To harness the advantages of collaboration, collective learning — defined as the broadened and mutual understanding of public issues resulting from repeated social interactions — is indispensable but not spontaneous. It requires participants within collaborative networks to update their beliefs and develop a deeper understanding of each other’s constraints, interests, and ideas. The diversity of participants within these networks presents learning opportunities that, while significant, do not always translate into tangible learning outcomes.
To explore how diversity contributes to collective learning in collaborative networks, our study focused on two networks within the city administration of Schaerbeek, Belgium. The first network centred on implementing sustainable procurement practices, while the second aimed to combat discrimination and promote diversity within the municipality. Over a span of approximately three years, public servants from various departments collaborated, exchanged information, and developed public policies.
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