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In recent years, researchers have shown an increased interest in studying the institutional environment–financial institutions’ performance nexus. However, little attention is paid to investigating the role of institutional quality in the financial sustainability of microfinance institutions (MFIs). Consequently, this study explores whether investments in strengthening institutional environment enhance MFIs’ financial sustainability.

The study relies on an unbalanced panel dataset of 136/138 MFIs in Sub-Saharan Africa (SSA) spanning from 2004 to 2018, which was obtained from the Microfinance Information Exchange (MIX) Market database under the World Bank catalog. Data for institutional factors are accessed from the World Bank database for World Governance Indicators (WGI). The study applies the two-step system generalized method of moments (GMM) to analyze the data.

The research uncovers that institutional environment matters in the financial sustainability of MFIs. The study shows that institutional quality is, in the aggregate, positively associated with financial sustainability. Different institutional factors also have distinct impacts on financial sustainability. While contemporaneous relationships are discovered between government effectiveness (GOVE), rule of law (RUL) and sustainability, the relationship between control of corruption (CCOR) and sustainability is an intertemporal one. Unlike the others, CCOR impacts sustainability with a one-year lag and not instantaneously. Nevertheless, the effects of the aforementioned institutional factors on financial sustainability are all positive and consistent with the result for the aggregate measure.

The practical implication of our findings to MFI managers is that strategies should be developed and instituted to manage MFI-specific factors appropriately and counterbalance the negative effect of a weak institutional environment (in SSA) on financial sustainability, as MFIs have no or less control over the institutional quality. For policymakers, our findings underscore the significance of policy documents that assist developing economies in improving their institutional environment, as strong institutions are vital for MFIs in the attainment of financial sustainability, which is crucial for sustainable poverty reduction.

While the extant literature provides valuable insights that different MFI-specific factors drive the financial sustainability of MFIs, the previous studies fail to address the role of institutional quality in the financial sustainability of MFIs. This study examines the nexus between institutional quality and financial sustainability, which has been ignored in the previous literature.

While poverty alleviation is the first core goal of Sustainable Development Goals (SDGs), and microfinance institutions (MFIs) are considered important instruments for poverty alleviation in developing countries as they provide credit access to the poor, there is surprisingly little evidence of the drivers of the lending behavior of microfinance institutions. Hence, the purpose of this study is to identify the factors that influence the credit growth of MFIs in Sub-Saharan Africa (SSA).

The study relies on unbalanced panel dataset of 130 MFIs operating across 31 countries in SSA during the period 2004–2014 constituting 546 useable observations. The study uses the Arellano-Bover/Blundell-Bond two-step generalized method of moments (GMM) Windmeijer bias-corrected standard errors to estimate the models.

The results confirm that while capitalization, liquidity and size are positively associated with credit growth, profitability negatively impacts credit growth; whereas, other MFI specific factors namely portfolio quality, deposit growth and nondeposit borrowing growth have little direct effects on MFI credit growth. The results also show that MFI credit growth is pro-cyclical but negatively related to GDP per capita consistent with the theory of convergence. On the other hand, inflation and employment are not important covariates in the credit growth of MFIs.

The findings suggest that if MFIs improve their liquidity and size by attracting more deposits and nondeposit borrowings, among others, they can increase credit access to the poor. Moreover, since the lending behavior of MFIs is not resilient to GDP shocks, different measures are needed to increase the financial stability of the microfinance industry. In this respect, since MFI capitalization is positively associated with credit growth and MFI credit growth is pro-cyclical, the findings provide useful insights to central banks/regulatory authorities and the Basel Committee as to the need for a counter-cyclical capital buffer requirement in the microfinance industry.

The study is the first comprehensive study to examine the drivers of MFI lending behavior as an extension to lending behavior models from the banking industry.