2025-06-16-世界银行-正规贷款能提升中小企业绩效吗_Meta分析的关键要点（英）_39页_2mb

This meta-analysis synthesizes evidence from 24 studies to assess the impact of formal loans on small and medium-sized enterprise (SME) performance. The study finds that formal loans increase SME employment by 12%, sales by 18.3%, and profits by 17.6%, with all effects statistically significant at the 95% confidence level. These results are derived from a Bayesian hierarchical model, which accounts for heterogeneity across studies.

Key findings include that loans issued by public financial institutions have a larger effect on employment compared to those from private banks, suggesting misaligned incentives in profit maximization versus SME growth. Subgroup analyses show limited variation in effects based on loan guarantees, country income levels, or firm size, but public banks' influence is notable in contexts like Brazil.

The study highlights a tradeoff: public banks may extend credit to more constrained firms but face risks of inefficiency and political capture; private banks may prioritize less risky borrowers. Policies to improve SME lending could include strengthening credit infrastructure and fostering competition.

The average effects are robust across different estimation methods, but predictive distributions indicate substantial uncertainty, with probabilities of negative effects ranging from 8.6% to 17% in new studies. Overall, formal loans boost SME performance, but effectiveness depends on institutional contexts.