From Fragmentation to Integration: A Systematic Review of Interest Group Involvement in Policy‐ and Rulemaking

The involvement of societal interests in the making of (statutory) legislation and regulation is an essential part of democratic governance and regulatory development. Thus, it comes as no surprise that the topic has been explored from various angles across the academic landscape. This systematic literature review explores the analytical dimensions and explanatory factors of interest group involvement in policy‐ and rulemaking processes. Drawing on 48 studies identified through the PRISMA statement, it reveals a fragmented yet converging field. While the literature often presents itself as anchored in one conceptual tradition, many contributions implicitly engage with various scholarly traditions. This engagement, albeit implicit, points to a latent convergence in the field that is not always made explicit in conceptual approaches, theoretical framing, or methodological design. Therefore, this review not only identifies gaps and connections in the field; it also highlights the potential for closer dialogue and mutual learning.