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This study aims to investigate the swelling behavior, mechanical and thermal properties of ternary rubber blend composites prepared by melt blending based on carbon black (CB)-filled natural rubber (NR)/styrene-butadiene rubber (SBR)/nitrile butadiene rubber (NBR) blends, containing a variety of compatibilizers. Various compatibilizers, maleic acid anhydride (MAH), prepared emulsion and adhesion system (HRH) were used. A series of NR/SBR/NBR blends at a 30/30/40 blend ratio reinforced with 45 phr of CB were prepared using the master-batch method.

Thermal aging properties of the composites characterized by their aging coefficient and retention in tensile and elongation at break (E.B. %). Thermal degradation of ternary rubber blend composites based on melt blending has been studied using thermogravimetric analysis.

The swelling coefficient decreased with increased compatibilizer loading. Results also showed that the tensile strength and E.B. (%) decreased with aging over the entire aging period. Additionally, the addition of compatibilizers into the ternary rubber blend composite had slightly improved the thermal stability.

Interactions between the different components of blends at the interfaces have a high impact on the interfacial properties of the rubber blend.

Compatibilizers significantly improve the properties of the resulting composites with the loading of investigated compatibilizers because of the uniform dispersion of CB in the rubber matrix.

Using blends in the rubber industry led to the high-efficiency production of low-cost products.

The rubber blending has a significant positive effect on a wide range of applications such as structural applications, aerospace, military, packaging, tires and biomedical, so improving the compatibility of blends will make new materials suitable for new applications.

This paper aims to study the effects of various compatibilisers (maleic anhydride (MAH), methyl methacrylate/butyl acrylate emulsion lattice, and adhesion system (HRH)) on properties of carbon black (CB) filled with natural rubber (NR)/styrene-butadiene rubber (SBR)/ nitrile butadiene rubber (NBR) blends). A series of NR/SBR/NBR blends at a 30/30/40 blend ratio reinforced with 45 phr of CB was prepared using the master-batch method.

The tensile properties such as the tensile strength, stress at 100, 200 and 300% elongations, and elongation at break (EB)% were studied. Additionally, the morphological properties of compatibilised and uncompatibilised composites were compared to determine the optimal compatibiliser content.

The influence of compatibilisers appeared on all the properties studied. The properties of the blends compatibilised with prepared emulsion are very distinct from those of blends compatibilised with MAH and adhesion systems.

Interactions among the different components of blends at the interfaces have a high impact on the interfacial properties of the rubber blend.

Compatibilisers significantly improve the physicomechanical properties of the resulting composites with the loading of investigated compatibilisers because of the uniform dispersion of CB in the rubber matrix.

Using blends in the rubber industry leads to high-efficiency production of low-cost products.

The rubber blending has a significant positive effect on a wide range of applications such as structural applications, aerospace, military, packaging, tires and biomedical. Hence, improving the compatibility of blends will make new materials suitable for new applications.

The purpose of this study is to investigate the value relevance of accounting information for Islamic, conventional and hybrid banks. It also investigates the moderation impact of IFRS adoption and AAOIFI mandatory adoption on value relevance of accounting information.

Using value relevance models, The authors run panel data regressions on 47 Islamic banks, 112 conventional banks and 42 hybrid banks (conventional banks with Islamic windows). The study covers listed banks from 14 countries over the period 2010–2018.

paper offers three empirical evidences. First, the authors find that value relevance of accounting information is higher for Islamic banks, compared to conventional banks. Second, the authors find that IFRS framework strengthens the relevance of accounting information in Islamic banks, but the authors did not find the same for hybrid banks. Third, the authors find that the mandatory adoption of AAOIFI accounting standards has a moderation effect on value relevance of accounting information for both Islamic banks and hybrid banks. The robustness analysis shows that there is a significant contribution of compliance with Islamic Finance rules in IBs and HBs, which substantially reduces managers' opportunistic behavior to manage accounting information.

One limit of this research is the reduced number of sampled listed IBs since the authors deleted countries that do not have both listed Islamic and conventional banks.

The study is useful for investors that consider the Islamic ethical practices to make their investment decisions as well as for the standards-setting bodies that focus on establishing accounting standards for the Islamic banking industry.

The authors contribute to the value relevance literature by providing novel evidence on the value relevance in fully-fledged Islamic, fully-fledged conventional and hybrid Banks. The authors also provide new evidence on the moderating role of International Financial Reporting Standards (IFRS) and Auditing Organization for Islamic Financial Institutions standard (AAOIFI) for the value relevance of accounting information.

The main objective of this paper is to analyze works of literature on SRI sukuk to highlight the potential for these kinds of instruments in financing more sustainable financial systems (SFSs). The analysis mainly accentuates a dearth of knowledge on the various challenges and opportunities in the realm of SRI.

This paper pioneers the bibliometric and systematic literature review of the development of the SRI sukuk from 2016 (the first available year in the field) to and 2021.

The study findings highlighted several pertinent SRI issues: the lack of standardization due to the different interpretations of Shariah and green, the lack of retail investors, which inevitably produce a lack of liquidity in the secondary market, thus limiting their growth, its funding allocation’ close resemblance to green financing, and the role of Malaysia and Indonesia as global sustainable financial hubs to stimulate the development of Shariah-compliant sustainable instruments and contribute to the international debate about the building of a global standardized framework related to sustainable investments.

The integration of the environmental principles of a green bond with the Shariah-compliant financial structure of a sukuk, the SRI sukuk, represents a vital crossroad in both sustainable and Islamic finance. Social-impact sukuk and green sukuk is an undervalued instrument that could play an important role in financing a more sustainable economic and financial system, including Islamic investing. This kind of instruments, which is based on a “pay for success” principle in the conventional layout, perfectly fit with the profit-and-lost sharing’s (PLS's) ethicality, the sustainability principles of Islamic finance and the religious principles of Islamic law.

The purpose of this study is to critically evaluate how conventional and Islamic banks trade off risk, efficiency and financial performance in their business models, to investigate how patterns of risk and efficiency vary between conventional and Islamic banks and to critically evaluate how the profitability of conventional and Islamic banks varies following the financial crisis.

This study uses univariate and multivariate statistical techniques by investigating 12 Islamic banks and 34 conventional banks operating in the Gulf Cooperation Council (GCC) region has been studied over the period 2011–2018.

The results suggest that Islamic and conventional banks differ not in the levels of efficiency, risk and profitability, but rather in how risk and efficiency influence banks’ financial performance. Islamic banks are found to be less influenced by the adverse effects of credit risk, which is consistent with the risk-sharing nature of Islamic financing. However, the results only hold for return on assets (ROA) and return on equity (ROE) while the net interest margin is observed to be negatively influenced by credit risk. Lower cost-income efficiency is also found to boost ROA and ROE of Islamic banks which could be attributed to a larger share of non-interest revenues due to Sharīʿah-compliance.

From a theoretical point of view, this study helps to understand the risk, efficiency and financial performance of Islamic banks in comparison with conventional banks.

The results of this study can serve bank managers, regulators and shareholders. Policymakers should encourage a more risk-sharing structure of Islamic financing as it brings less adverse effects of credit risk and increases income sustainability for Islamic banks. The present study may help bank managers to improve the financial performance of their firms by controlling risk and efficiency. The study results also have implications for shareholders and depositors of Islamic and conventional banks as they should have a predetermined position about the level of credit risk and efficiency in each banking system.

The foremost contribution is that this is one of the few studies to compare risk, efficiency and financial performance of Islamic and conventional banks in the GCC region. By using the latest data, this paper hopes that the findings will be more relevant than previous studies to the current situation of the banking industry in the region.

The purpose of this study is to investigate the post–enterprise resource planning (ERP) issues and challenges in the context of Saudi Arabia. There is a lack of research in the context of developing countries regarding post-ERP implementation issues and challenges. The high failure rate of the ERP system is a reflection of many management issues that occurred at different phases of ERP implementation. Previous research indicated that even after a successful implementation, the ERP system was unable to sustain itself in the organizations.

An exploratory case study design was adopted to proceed with this research process at two organizations in Saudi Arabia. The interviews of the top and middle management are conducted and transcribed. These case studies were further analyzed using the Creswell approach to generate several themes, and descriptions provided a deeper understanding of the post ERP implementation issues and challenges.

Research findings show that for successful ERP implementation, identified factors are top management support, integration, strategy, employee resistance, BPR, change management, vendor selection, team formation and culture. Moreover, factors for the post-ERP implementation that led to sustainability are top management support, training, system adoption, system testing, data migration, cost overrun, employee retention and post-implementation support.

This study is unique in its type to examine the issues and challenges organizations face after deploying ERP initiatives. This research's findings were useful and supportive for the senior management interested in successfully sustaining such an initiative in the organization.

This paper aims to examine the association between earnings management and the value relevance of earnings (the latter is operationalized by earnings response coefficient). Specifically, this study examines whether opportunistic earnings management has a negative impact on the value relevance of earnings for a sample of firms listed on the Egyptian Stock Exchange.

Different from prior work and due to data limitations in the Egyptian market, this paper first examines for the existence of earnings management based on the whole operating performances of the firms by testing whether firms with low/poor operating performance are more likely to choose income-increasing actions (strategies) than firms with high operating performance. After confirming that low operating performance firms manage earnings upward, the authors then assess whether this opportunistic earnings management by these low operating performance firms reduces the value relevance of earnings. This is performed by estimating a model of the relationship between stock returns and accounting earnings with a dummy variable that allows parameter shifts for earnings of low operating performance firms.

The results show that discretionary accruals are positive and significantly higher for firms with low operating performance than those for firms with high operating performance. These results indicate that low operating performance firms increase the earnings management practices by probably increasing their reported earnings opportunistically to mask their low performance. Furthermore, the results show that the earnings response coefficient is significantly smaller for earnings of low operating performance firms than that for earnings of high operating performance firms. These results suggest that earnings of firms with low operating performance (that are engaged in opportunistic earnings management strategies) have less value relevance than earnings of firms with high operating performance, i.e. the informativeness of managed earnings is lower than that of non-managed earnings.

Based on these results, it is plausible that the presence of opportunistic earnings management adversely affects the value relevance of accounting earnings.

Consistent with previous results from developed countries, this study shows that earnings management is a significant factor that affects value relevance of earnings in Egypt.

Motivated by the lack of research on the value relevance of accounting information in the emerging markets of Middle Eastern countries, and the unique institutional and accounting setting in Egypt, this paper aims to investigate the relation between capital market and accounting information in the emerging market of Egypt. Specifically, based on Egyptian data, this study examines the value relevance of earnings, cash flows from operations and book values.

To examine the value relevance of the above accounting measures, this study uses statistical associations between accounting information and capital market values: the association between earnings and annual returns; the association between cash flows and accruals, and annual returns; and the association between earnings and book values of equity, and stock prices.

The results show that, first, earnings have value relevance. However, earnings changes are significantly more successful than earnings levels in explaining security returns. These results suggest that changes in earnings are largely permanent; hence, earnings follow (close to) a random walk model. Second, contrary to what is stated in the literature, cash flows from operations are not successful in explaining stock returns. This result suggests that cash flows are less important and not value relevant in Egypt compared to the USA or the UK. A possible explanation is that cash flows in Egypt are very volatile (high variance) and not persistent, so the market does not rely on them. Third, individually, both earnings and book values significantly explain stock prices; however, jointly, earnings have incremental explanatory power beyond book values for stock prices whereas book values do not. These results suggest that in Egypt the income statement is much more important than the balance sheet for valuation purposes. Overall, these results are interesting because they do not completely replicate the results from other countries.

The existence of value relevance for earnings despite the apparent lack of value relevance for cash flows can be interpreted as indicating that accruals are designed to offset and smooth cash flows’ volatility and low value relevance, so that earnings are relatively more persistent and relevant. These results show that earnings potentially are a much more important and informative measure of a firm’s value than cash flows from operations in Egypt. However, we certainly need the cash flows information as an ex-post validation of the prior earnings. Overall, it appears that the investors in Egypt are looking at the accounting data when evaluating the value of the firm, which is a good sign. However, the empirical findings of this paper are discussed.

This study contributes to the limited research on value relevance of accounting information in the emerging market of Egypt.

This paper investigates the effect of political connections on the capital structure of banks before and after the financial crisis in Gulf Cooperation Council (GCC) countries.

This paper employs the natural experiment that the financial crisis offers and uses a difference-in-differences model to investigate the effect of political connections on capital structure. Capital structure is measured by the total debt to total assets ratio. Control variables include bank size, growth, profitability, coverage ratio and volatility. The research sample includes all the banks in the GCC from 2005 to 2016.

The authors find that political connections negatively affect banks capital structure decisions. The results contradict the claim that politically connected firms tend to sustain higher debt due to government privilege and a lower chance of bankruptcy. Additionally, the results show that after the financial crisis, politically connected banks de-lever more compared to non-connected counterparts. This could suggest that the degree of support received by connected banks changes or that they exploit their retained earnings for financing (individual country results, however, suggest that leverage increases in Qatar).

This paper provides several contributions. First, GCC countries present an interesting and important area in which to study the relation between political connections and capital structure as it represents a mix of newer markets that seek to attract investors and foreign capital. Second, to the best of our knowledge, the present study is the first to examine the effect of the political connection and capital structure in GCC region where royal families play a significant role, especially for banks. Third, our paper is the first to link connections with leverage after the financial crisis in the banking sector. Moreover, our paper is the first to investigate this phenomenon in the GCC countries using manually collected primary data.