Background: An entrepreneurial ecosystem is useful as an analytical idea because firms rarely grow through one resource alone. Finance without markets can create debt, training without demand can remain unused, and digital tools without managerial capability may simply add cost. Aims: This article examines the mechanisms that connect the topic to organizational or policy performance and identifies the conditions that make those mechanisms stronger or weaker. Research Method: A structured narrative review integrates peer-reviewed research with authoritative policy, statistical, and professional sources, including UNCTAD (2025); OECD (2023). Sources are coded by outcome, mechanism, boundary condition, and practical implication. Results and Conclusion: The synthesis indicates that outcomes are heterogeneous. Ecosystem language can become vague when every organization and programme is treated as equally important. The practical task is to identify the bottlenecks and connections that matter for specific groups of SMEs at specific stages of development. Six recurring themes show that implementation quality, information, capability, and institutional context frequently matter as much as the headline policy or technology. Contribution: The article offers an evidence-based framework for SMEs, entrepreneurs and local ecosystem organizations that translates the literature into decision principles without claiming primary data that were not collected.
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