Revisiting Financial Development: From Financial Depth to Financial Efficiency

Introduction: Financial development has traditionally been assessed through financial depth, commonly measured by indicators such as private credit, bank assets, and market capitalisation. However, a larger financial system does not necessarily imply greater efficiency. While previous studies have focused primarily on financial depth, limited attention has been given to financial efficiency as a distinct dimension of financial development. This study addresses this gap by examining whether greater financial depth translates into higher financial efficiency across selected European economies, thereby providing new evidence on the relationship between the size and effectiveness of financial systems.

Methods: The study employs a balanced panel dataset covering selected European economies from 2004 to 2025, using data obtained from internationally recognised databases. Financial efficiency is measured using the Financial Development Efficiency Index from the IMF Financial Development Database. The empirical analysis applies Ordinary Least Squares (OLS), Fixed Effects (FE), and Random Effects (RE) estimators, supported by standard panel-data diagnostic tests to identify the most appropriate model specification.

Results: The empirical findings reveal a positive and statistically significant relationship between financial depth and financial efficiency across the estimated models, indicating that deeper financial systems tend to allocate financial resources more efficiently. In addition, macroeconomic conditions explain an important share of cross-country variation in financial efficiency, highlighting the role of broader economic fundamentals.

Conclusions: This study contributes to the financial development literature by shifting attention from financial depth to financial efficiency and by distinguishing between the size and effectiveness of financial systems. The findings suggest that financial development should be evaluated not only by the expansion of financial resources but also by the efficiency with which they are allocated and utilised. These results provide useful implications for policymakers seeking to strengthen financial system performance and resilience in an increasingly digital economy.