Understanding Post-COVID Public Sector Innovation: A Systematic Review of Concepts, Antecedents, Outcomes, Constraints, and Theoretical Perspectives

This study systematically reviews 53 peer-reviewed articles on public sector innovation published between 2021 and 2025 to synthesize knowledge on how innovation is conceptualized, triggered, enacted, and constrained. Findings reveal that innovation is framed across technological, organizational, governance, and social dimensions, reflecting substantial conceptual and theoretical diversity. Key triggers include digital transformation, leadership, inter-organizational collaboration, fiscal pressures, and workforce capabilities, with emphasis shifting toward technology, human capital, and collaboration in recent years. Innovation produces both positive outcomes, such as improved service quality, efficiency, and citizen engagement, and negative or unintended consequences, including implementation failures, equity concerns, and employee resistance. Persistent barriers, such as bureaucratic rigidity, risk-averse culture, accountability pressures, and political interference, operate as structural conditions rather than isolated obstacles. Theoretical foundations remain fragmented, with New Public Management, New Public Governance, institutional theory, and public value theory applied inconsistently. These findings underscore the need for integrative, context-sensitive approaches that combine institutional, human, and technological perspectives to guide innovation effectively. The review offers actionable insights for public managers and policymakers, emphasizing alignment with organizational capacity, leadership, and regulatory design, and highlights directions for future research to advance theory, practice, and policy in public sector innovation.