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This paper aims to examine the impact of bank’s capital buffer on return on equity (ROE) in the context of Islamic and conventional banks in GCC countries.

The authors collect data from 83 commercial banks comprising of 49 conventional banks and 34 Islamic banks for the period 2010–2019. The final data set comprises of 744 bank-year observations. The authors apply generalized methods of moments estimation technique and panel least square to analyze the data.

The authors document that Tier-1 capital, total regulatory capital (TRC) and equity to asset ratio (EAR) negatively affect banks’ ROE. However, the impact disappears for conventional banks and sustains for Islamic banks if these two clusters of banks are treated separately. Furthermore, the negative impact of equity capital on earning is more pronounced for large and listed commercial banks.

Findings of this research imply that Islamic banks in GCC countries has scope to manage equity capital more efficiently. Hence, they should concentrate on using banks equity wisely to successfully compete with the conventional banks.

Since the global financial crisis of 2009, Islamic banks of GCC countries have been reporting lower ROE compared to their conventional counterparts. On the other hand, Islamic banks maintain higher level of Tier-1 capital, TRC and EAR. This evidence hypothetically suggests that Islamic banks are overly cautious in managing their capital buffer that results in lower ROE. To the best of the author’s/authors’ knowledge, no other study in the literature tests this hypothesis in the GCC context.

This study aims to explore the impact of instability on bank performance by examining how economic uncertainty interacts with the profitability of both Islamic and conventional banks (CBs) in Indonesia.

This study applies a quantitative methodology, applying dynamic linear analysis through autoregressive distributed lag estimation and leverages time-series data from Indonesia’s banks. Specifically, bank profitability is measured using income before taxes, whereas economic uncertainty is gauged by weighting macroeconomic factors through principal component analysis.

Economic uncertainty affects the profitability of both Islamic banks and CBs in Indonesia, with CBs being more negatively impacted than Islamic banks.

Economic uncertainty has a notably different impact on banks’ profitability in Indonesia, highlighting the critical need for stabilization measures to reinforce the foundations of the financial institution management system and integration policy frameworks.

Strengthening the management of integration policies should be prioritized to enhance financial stability in larger banks during economic uncertainty. Policymakers should focus on the profitability of CBs during periods of economic uncertainty as it has a bigger impact than the Islamic banking industry.

This study underscores the importance of sustainable development strategies in enhancing banking performance during periods of uncertainty. At the same time, studies examining the relationship between economic uncertainty and bank profitability remain limited, particularly when comparing Islamic banks and CBs in Indonesia.

This study aims to develop a comprehensive sustainability performance index tailored for Takaful operators. It integrates Maqasid Al-Shariah’s principles with key stakeholders’ expectations, ensuring a holistic evaluation of sustainability practices.

The index is formulated through a multi-step process, beginning with a thorough literature review to identify pertinent economic, social, environmental and religious indicators. Using a Multi-Attribute Utility Theory approach, the process incorporates expert consultations, stakeholder workshops and the analytical hierarchy process. The framework amalgamates diverse sustainability attributes, focusing on regulatory compliance, financial performance, customer satisfaction, workplace environment and community engagement. The final index is tested with data from various Takaful operators to validate its reliability and robustness.

The newly developed index effectively captures the multifaceted aspects of sustainability specific to Takaful operators, offering a balanced assessment across economic, social, environmental and religious dimensions. Findings suggest that while Takaful operators excel in community welfare and ethical compliance areas, there are notable gaps in integrating environmental and social governance factors. The index successfully highlights these gaps, providing a structured framework to enhance the sustainability practices of Takaful operators. Initial applications of the index reveal significant variability in sustainability performance among Takaful operators, pointing to areas needing improvement.

The development of the index is limited by the availability and quality of data from Takaful operators. Future research should aim to improve data collection methods and expand the index’s application to a broader range of operators.

Takaful operators can use the index as a transparent and objective tool to evaluate and improve their sustainability practices, facilitating better decision-making and strategic planning towards achieving sustainable development goals.

By incorporating Maqasid Al-Shariah and stakeholder perspectives, the index promotes socially responsible and ethically sound business practices within the Takaful industry, aligning with broader societal values and expectations.

This paper introduces the first comprehensive sustainability performance index specifically designed for Takaful operators, integrating religious principles with conventional sustainability metrics. The index provides substantial value for researchers, practitioners and policymakers dedicated to enhancing sustainability in the Islamic finance sector.

This study aims to explore the key factors influencing customer loyalty in Islamic banking within the Iraqi market, as well as the consequences of loyalty. Despite the increasing global significance of Islamic finance, there is a notable lack of empirical research addressing how both causal and contextual factors shape customer loyalty in Iraq. This research seeks to fill this gap by examining the dynamics of customer loyalty and its perceived value to customers, thereby contributing to a deeper understanding of customer relationships in Islamic banking.

The research is conducted using a grounded theory approach, allowing for an exploration of the objective through in-depth qualitative analysis. In-depth interviews are conducted with various stakeholders, including customers, managers and bank employees. The inclusion of heterogeneous groups offers a richer and deeper understanding, increasing the validity and transferability of the findings.

A model of customer loyalty in Islamic banking in Iraq is developed, highlighting social, individual and banking characteristics as indicators of causal factors. Macroeconomic trends, government policy and media and advertising are identified as contextual factors, while competitor actions, life events and demographic profiles are recognized as intervening factors. The findings also suggest that loyalty brings positive values not only to the customers, such as positive experiences, lifetime value and better financial stability, but also to the banking institutions, including word-of-mouth referrals, competitive advantage and increased customer advocacy.

This study contributes to the advanced development of a theoretical framework on customer loyalty. In addition, the findings offer valuable insights into the relationship between Sharia compliance and customer loyalty, calling for banking institutions to prioritize adherence to Sharia principles.

This study explores areas of research within the context of Iraqi Islamic banking, allowing for the discovery of new and original insights into causal, contextual and intervening conditions of customer loyalty, which signify the Iraqi social phenomena. While the scope focuses on customers, the grounded theory approach opens up to emergent patterns and relationships.

The study aims to assess the awareness, perception and adoption of artificial intelligence (AI) in Bangladesh’s healthcare sector.

This study utilizes a quantitative methodology. A survey with structured questionnaire was conducted with a sample of 399 healthcare professionals and public members through stratified random sampling. Descriptive statistics summarized participant demographics, while inferential statistical techniques, including regression analysis, examined relationships between AI readiness and adoption.

Using a conceptual framework, the study explored factors influencing AI adoption in Bangladesh’s healthcare sector. The measurement model confirmed reliability and validity, with strong factor loadings and discriminant validity. Structural model analysis revealed that social media influence (SMI) and technological awareness (TA) significantly enhanced readiness for AI (RAI) (path coefficients: 0.354 and 0.162, respectively). Perceived risk (PR) had a weaker positive effect (0.123), while perceived susceptibility (PS) and personal innovativeness (PI) were insignificant. Mediation analysis showed that RAI significantly mediated the effects of TA and PR on the adaptation of AI (AAI).

The study suggests policymakers develop robust regulatory frameworks to address privacy concerns, enhance trust in AI and implement educational initiatives to improve AI literacy among healthcare stakeholders in Bangladesh.

This study offers insights into AI adoption in Bangladesh’s healthcare sector. It addresses gaps in awareness and perceptions among professionals and the public, contributing to the limited research in this context.

This study aims to examine the dynamics of the market development of Islamic banking in Pakistan. This study investigates how shocks to the economy in the form of changes in benchmark rate and exchange rate and internal factors such as efficiency, profitability and asset quality affect the development of Islamic banking. The study also evaluates the impact of Islamic banking on the real economy in the macro perspective and society at large in terms of inclusiveness, competitiveness and fairness.

Autoregressive distributed lagged model method is used for analysing the short-run and long-run determinants of market development of Islamic banking and the economic impact of Islamic banking on the real economy.

Profitability and exchange rate have a positive effect on market development of Islamic banking while higher inefficiency and interbank rate have a negative effect. On the other hand, financing intensity and profitability in Islamic banking positively affect the large-scale manufacturing sector.

Stable profits, high asset quality, efficiency and rising import demand with low policy rate environment complement Islamic banking growth. Moreover, the economic assessment shows that Islamic banks have been able to achieve the financial inclusion of those who want to avoid Riba, but they need concerted efforts to improve competitiveness and distinction with regard to distributional impact.

To the best of the authors’ knowledge, this is the first study in Pakistan to evaluate determinants of market development of Islamic banking taking 16-year quarterly data and assessing the economic effects of Islamic banking on inclusiveness, competitiveness and fairness.

This study aims to explore the strategic integration of Sharia-compliant and environmental, social and governance (ESG)-focused investments within global equity portfolio optimization frameworks, with a particular emphasis on variance minimization and dynamic rebalancing techniques.

The research uses historical data from Sharia-compliant, ESG-focused and conventional equity exchange-traded funds (ETFs). Advanced mean-variance optimization methodologies via quadratic programming are employed, encompassing static optimization with and without a 50% cap on individual asset weights, dynamic optimization with monthly rebalancing and rolling window optimization.

Portfolios integrating Sharia-compliant investments frequently outperform those composed solely of conventional equity ETFs. Dynamic optimization with monthly rebalancing achieved the highest Sharpe ratio (1.3708) and demonstrated enhanced portfolio resilience during market turbulence, such as the COVID-19 pandemic. Sharia-compliant investments showed substantial allocations during key periods, with weights reaching up to 100% in the first half of 2020. In contrast, ESG-focused investments exhibited more limited and sporadic allocations, reflecting a more opportunistic role in the portfolio.

The findings reaffirm the critical role of Sharia-compliant investments in well-diversified, risk-conscious portfolios while also providing nuanced insights into the more selective integration of ESG-focused assets. The results offer practical guidance for portfolio managers seeking to integrate ethical and sustainable investment principles within advanced portfolio optimization frameworks, particularly when focusing on minimizing variance and dynamically responding to evolving market conditions.

The study contributes to the growing body of literature on ethical and sustainable investments, demonstrating that it is possible to balance ethical considerations with robust financial performance. The research underscores the potential for Sharia-compliant investments to play a significant role in global portfolios, potentially fostering greater financial inclusion and cross-cultural understanding in the investment community.

This research provides novel insights by focusing on Sharia-compliant investments within non-Muslim countries, an area that has been relatively underexplored. It also compares the outcomes of static, dynamic and rolling optimizations, highlighting the dynamic interplay between ethical investment principles and financial performance.

This study aims to determine how Basel III capital requirements affect the stability of Islamic banks globally during the global financial crisis and the COVID-19 pandemic.

The secondary data for all Islamic banks worldwide from 2004 to 2021 is obtained from the FitchConnect database. The main technique was a two-step generalized method of moment (GMM) system, and the data were tested using pooled ordinary least squares, fixed effects and difference GMM models for robustness checks.

Regression results support the moral hazard hypothesis based on evidence that both the total capital ratio and the Tier 1 capital ratio have a statistically significant positive impact on the stability of Islamic banks globally. Furthermore, neither the global financial crisis of 2008–2009 nor COVID-19 (2020–2021) significantly impacted the stability of Islamic banks worldwide. The results are robust across alternative measures of stability, capital buffers, dummy variables and estimation techniques. According to the descriptive statistics, the number of Islamic banks that disclose their regulatory capital ratios to the public has increased over the study period, and the mean of total capital and Tier 1 ratios are considerably greater than what is required by Basel II and Basel III.

Bankers, regulators and policymakers should benefit from the evidence on capital and risk management in Islamic banking according to Basel Committee on Banking Supervision (BCBS) and Islamic financial services board (IFSB) international standards in various jurisdictions.

This research builds on earlier studies that were both beneficial and instructive by exploring the relationship between BCBS and IFSB capital guidelines and the trustworthiness of Islamic banks in greater depth. This study uses numerous capital ratios, buffers and stability measures to provide an international context for research on Islamic banking. In addition, the database is up-to-date to include information about the COVID-19 pandemic aftereffects in the year 2021. This study also introduces the Basel membership of Islamic banks to provide context for countries still at the Basel II stage or are yet to begin implementing the Basel III international standard.

With the emergence of coronavirus disease 2019 (COVID-19), the usage of e-money has been reinforced to reach the next level. Therefore, this study aims to examine the mediating role of perceived behavioral control (PBC) on the nexus of customers' innovativeness and continuance intention of electronic money (e-money). This study also explores the moderating roles of perceived risk (PR) and electronic security (e-security) in relationships.

The authors employed a structured questionnaire for data collection and the partial least squares structural equation modeling (PLS-SEM) for empirical estimations.

The authors' findings reveal that customers' innovativeness promotes continuance intention of using e-money and demonstrate that PBC partially mediates the relation between customers' innovativeness and continuance intention of using e-money. The empirical findings also reveal that PR negatively moderates the relationship between customers' innovativeness and continuance intention and the relationship between customers' innovativeness and PBC. The empirical findings also exhibit that perceived e-security enhances the degree of the relationship between customers' innovativeness and continuance intention and the relationship between customers' innovativeness and PBC.

The findings shed light on an important factor that increases the likelihood of repeat e-money usage and has direct managerial implications for customer experience and risk concerns. Hence, the findings imply that e-money service providers should run a promotional advertisement highlighting what additional features are included or offered and how these could be beneficial for the customers. Furthermore, e-money service providers should provide some tutorial videos in order to increase innovative customers' control over e-money services as well as highlight how risk and security are protected.

This paper integrates three key theories: the diffusion of innovation (DOI) theory, the theory of planned behavior (TPB) and the PR theory in post-adoption behavior of e-money usage. The current study also attempts to fill a literature gap by examining the moderating role of PR and e-security, which could be useful within the relationship between customers' innovativeness, PBC and customers' continued intentions of e-money usage.

Islamic economics was initially established as a discipline within a noninterest framework to foster equitable and sustainable growth. Its focus on noninterest equality has transitioned to noninterest finance over time. The finance-driven approach needs being reformed as it may not generate structural solutions for the current macroeconomic challenges – including high inequality of income, sluggish growth and high interest rates. This study aims to ascertain whether Islamic economics is progressing in the correct direction by estimating whether noninterest equality or noninterest finance has a greater impact on aggregate income and lending interest rates in three steps.

The first step involves estimating the total effect centrality of income inequality and interest-bearing finance in the economies of the US, the UK and Germany. In the second stage, it is estimated whether the negative impacts of lending interest rates on aggregate income in these nations are exacerbated to a greater extent by income inequality or interest-bearing finance. The third step involves estimating whether income inequality or interest-bearing finance has a greater impact on increasing lending interest rates.

The study presents four findings. First, income inequality has a greater total effect centrality than bank credits in a network of aggregate income, lending interest rates, income inequality and bank credits in the UK and Germany. Second, the rising income inequality in the United States exacerbates the adverse effects of lending interest rates on aggregate income more significantly than bank credits. The slightly declining income inequality in the UK reduces the negative impact of lending interest rate on aggregate income, whereas bank credits exacerbate it. The negative effect of lending interest rates on aggregate income in Germany is converted into a positive effect by a progressively decreasing income inequality, whereas bank credits exacerbate it. Third, the extent of income equality’s alleviating (mediating) impact on the negative influence of lending interest rates on aggregate income intensifies with a greater reduction in income inequality. Fourth, banking credits convert the negative impacts of income inequality on lending interest rates into positive effects in the UK and Germany. They amplify the positive impact of income inequality on lending interest rates in the United States.

The study suggests that students of Islamic economics should focus on studying noninterest equality either no less than or more than noninterest finance to foster equitable growth, which is the most fundamental quantitative goal of Islamic economics.

This study is the first, to the author’s knowledge, to compare noninterest equality of income and noninterest finance using time-varying networks and mediation analysis. The study’s findings are crucial for comprehending the importance of income inequality in Islamic economic research, particularly in relation to its comparative significance with Islamic finance. Such an insight could potentially facilitate the application of the noninterest equality of income as a viable solution to the persistent predicament facing modern economies.