Shariah board characteristics and Islamic banks' performance: a meta-analysis

PurposeShariah board (SB) is a unique corporate governancemechanism in Islamic financial institutions. Over the last decade, an increasing number of studies discusses the relationship between SB and Islamic banks' (IB) performance. These researches report conflicting findings due to the heterogeneity of their samples. Therefore,the purpose of this paper is to meta-analyze the results of the previous empirical studies to assess if the differences in findings were attributable to moderating effects related either to the system of SB or the used SB variables or the variables used to identify performance. Design/methodology/approachTo examine the direct and moderating effects of SB attributes, this study uses a meta-analysis technique on a sample of 46 empirical studies, using Hunter and Schmidt's approach followed by three exploratory moderator analyses: ROE, ROA and Tobin' Q. Significant results are discussed. FindingsOverall, the meta-analysis findings show that there is a positive significant association between SB meetings and qualifications and IBs' performance. In testing the moderating effects of financial performance measurement during the post-subprime crisis period, the meta-analysis findings suggest that there is a positive significant association between SB characteristics (size, qualification, reputation, interlock and expertise) and performance. The meta-analysis findings stress the importance of several SB attributes in improving IBs' performance, especially, during the economic recovery period. Originality/valueThis paper adds significance to the extant Islamic finance literature as well as assists the appropriate stakeholders in assessing the determinants of IBs' performance from Shariah governance perspective. It further aims to reconcile the findings of the previous studies around the world. Moreover, the findings help future research to build a comprehensive Shariah governance index for IBs.