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The study aims to examine the impact of key variables on the success of solicited and unsolicited private participation in infrastructure (PPI) projects using machine learning techniques.

The data has information on 8,674 PPI projects primarily derived from the World Bank database. In the study, a machine learning framework has been used to highlight the variables important for solicited and unsolicited projects. The framework addresses the data-related challenges using imputation, oversampling and standardization techniques. Further, it uses Random forest, Artificial neural network and Logistics regression for classification and a group of diverse metrics for assessing the performances of these classifiers.

The results show that around half of the variables similarly impact both solicited and unsolicited projects. However, some other important variables, particularly, institutional factors, have different levels of impact on both projects, which have been previously ignored. This may explain the reason for higher failure rates of unsolicited projects.

This study provides specific inputs to investors, policymakers and practitioners related to the impacts of several variables on solicited and unsolicited projects separately, which will help them in project planning and implementation.

The study highlights the differential impact of variables for solicited and unsolicited projects, challenging the previously assumed uniformity of impact of the given set of variables including institutional factors.

The purpose of this paper is to elucidate the performance discrepancies between shariah-compliant and non-shariah-compliant exchange-traded funds (ETFs), aiming to enrich the academic and practical understanding of Islamic finance‘s nuances in the ETF sector.

Initiating with a broad literature review to cement a theoretical backdrop on Islamic investment principles and the mechanics of shariah-compliant ETFs, the research progresses to devise a comparative analytical framework. This framework focuses on assessing ETF performance through metrics like net asset value returns and volatility, specifically analyzing Blackrock ETFs to draw distinctions in portfolio outcomes and asset compositions.

The examination highlights discernible variances in portfolio performance between shariah-compliant and their conventional counterparts, presenting instances where shariah-compliant ETFs, such as ISUS from Blackrock, deliver competitive returns despite their generally lower net assets compared to conventional ETFs like VUSA from Vanguard. Moreover, the ISUS ETF‘s holdings investigation revealed discrepancies with AAOIFI standards, questioning its strict Shariah compliance and adding depth to the analysis of Islamic financial instruments‘ integrity.

This paper significantly advances the scholarly dialogue on Islamic financial practices within the ETF landscape, providing empirical evidence of performance differentials and compliance intricacies. While prior research has touched upon Islamic investing, this study pioneers a detailed comparative scrutiny, equipped with a novel methodological approach, to dissect the shariah-compliant ETFs‘ operational and ethical frameworks, offering invaluable insights for investors, financial analysts and Islamic finance scholars.

The purpose of this study is to explore a theoretical model using the unified theory of acceptance and use of technology framework by adding Islamic compliance (IC) and security assurance to build antecedents of intention to use Islamic internet-only banks (IIOBs) in Muslim youth.

This study involved 262 Muslim youths from several Islamic communities in Indonesia. The analysis was conducted using partial least squares structural equation modelling (PLS-SEM). Moreover, PLS techniques such as the variance accounted for (VAF) were used to verify the statistical analysis of findings.

The findings show that effort expectancy (EE) and online social influences (OSI) strongly correlate with the intention to use IIOBs. In addition, user reviews (online reviews) are proven to form a solid social influence and impact consumer decision-making. Finally, IC and security assurance are still critical factors in the IIOBs acceptance.

Practically, IIOB providers need to strengthen information about performance, accessibility, security and benefits when running service applications. Providers must show their strengths and advantages compared to the traditional banks in various service lines. Besides, providers are expected to be more careful regarding IC applications in their products and services.

This study considers the effects of OSI, EE, security and IC as the unique characteristics of Muslim youth in using the IIOBs. In particular, the significance of IC and OSIs provides a valid picture of the pathways of acceptance creation towards IIOBs.

This paper provides a critical assessment of Indonesia’s pioneering initiative in issuing cash waqf-linked sukuk (CWLS), a hybrid government sukuk integrated with Islamic endowment funds (waqf). Focused on addressing urgent health-care and essential expenditures, this study aims to evaluate the features and performance of CWLS sales.

Using a literature review and in-depth interviews, this study comprehensively analyzes CWLS from multiple perspectives.

The research indicates that CWLS effectively mobilizes public funds, benefiting the government by supporting essential needs and enhancing waqf management in Indonesia. Moreover, it significantly improves the quality of life through social projects financed by CWLS returns.

The study offers actionable recommendations for enhancing CWLS performance in Indonesia and serves as a suggestion for other governments considering similar financial instruments.

As a socially oriented financial tool, CWLS emerges as a pivotal strategy for enhancing national waqf management and promoting equitable wealth distribution.

This study represents the first critical assessment of CWLS in Indonesia, advancing theory by integrating Islamic finance principles with governmental fiscal policies through innovative sukuk structures. It contributes to the distributive justice theory by demonstrating how CWLS operationalizes fairness and equity in resource allocation.

A hypothesis developed in this paper models the relationship between the borrower and the bank as a dynamic game based on incomplete information (business game) and seeks an equilibrium point at which the facilitated applicant can act according to the terms of the loan agreement once the contract is signed and meet the requirements of the contract.

The primary assumption in the formation of the Islamic bank in Islamic society is that the members of the society are Muslims and act according to religious orders. However, the non-fulfillment of divine principles and orders is always possible. In partnership agreements, the risk of infringement is reduced and corrupt contracts are prevented in some circumstances. Our basic model was constructed using the Beer-Quiche classic game, which has been modified dynamically along with a generalization of complexity terms. The information asymmetry led us to use a heterogeneous belief system to evaluate the probability of the customer transmitting a low credit risk signal to the bank and the probability of the customer transmitting a high credit risk signal to the bank. There are several assumptions of the basic model that are released in the extended model by the presence of a social inspector, by exploring credit risk signals in the generalized model and by considering various commitment levels in the comprehensive model.

As a result, it is observed that there is no Nash equilibrium in cases where the customer applies separation strategies. But if the pulling strategies are applied, the Nash equilibrium can be achieved under certain conditions, including inspection bodies in the banking system, the creation of necessary transparency and the proper treatment of criminals by government and regulatory bodies. So, by using alternative belief systems, applying different filters and paying attention to all sectors of the economy, new Nash equilibrium points can be achieved. Moreover, multi-stage facilities payment reduces the risk of corrupt contracts.

This paper sets out to analyze Nash Equilibrium and its possible encounter in Islamic Banking for the first time, utilizing a Bayesian Game-Theoretic framework. A major aspect of the research is the contribution to a better understanding of the role of transparency and government oversight in the implementation of Islamic banking regulatory standards.

This study investigated the production of free and encapsulated nanoemulsions using Cordia myxa fruit peel (CMFP) extract and vitamin D3.

The CMFP extract was obtained using an ultrasonic technique, and its characteristics such as total phenolic content (TPC), antioxidant activity, cytotoxicity and gas chromatography-mass spectrometry (GC/MS) analysis were assessed. CMFP was encapsulated in vitamin D3 oil droplets of nanoemulsion prepared by ultra-homogenization using calcium alginate polymer. The nanoemulsions were evaluated for 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity, antimicrobial activity, morphology, Fourier transform infrared (FTIR) analysis and release rate in a simulated gastrointestinal model.

The GC/MS results revealed that pyrocatechol, cholestanoids and propionaldehyde were the predominant compounds in the extract. The highest cytotoxicity effect of CMFP was observed at concentrations of 6.25 and 12.5 ppm of the extract. Encapsulated nanoemulsions exhibited the highest antimicrobial activity against Escherichia coli (ATCC 35218). The antioxidant activity of the free and encapsulated nanoemulsions ranged from 25.81 to 36.08 mg/100g and 49.25–55.7 mg/100g, respectively. Free nanoemulsions showed a higher release rate in the simulated gastric model compared to encapsulated ones. The FTIR spectrum allowed for the identification of functional groups responsible for antioxidant and antibacterial properties, indicating that these properties of the nanoemulsions were maintained.

This study demonstrates the successful co-encapsulation of CMFP extract and vitamin D3 in nanoemulsions, which significantly enhanced the stability, bioavailability and functional properties of both compounds. Encapsulated nanoemulsions exhibited higher antioxidant and antimicrobial activities compared to their free counterparts, with controlled release in simulated gastrointestinal conditions. These findings confirm that nanoemulsion-based encapsulation is an effective strategy to protect and enhance the bioactivity of plant extracts and vitamins, supporting their potential use in functional food products and therapeutic application.

The objective of this paper is to investigate the impact of institutional quality, foreign direct investment (FDI) inflows and human capital development on Indonesia’s poverty rate.

The quantile regression on data ranging from 1984 to 2019 was used to capture the relationship between the impact of the independent variables (FDI inflows, institutional quality and human capital development) on Indonesia’s poverty rate at different quantiles of the conditional distribution.

The empirical results reveal that low-quantile institutional quality is detrimental to poverty eradication, whereas FDI inflows and human capital development are significant at higher quantiles of distribution. This implies that higher-value FDI and advanced human capital development are critical to lifting Indonesians out of poverty.

Policymakers should prioritise strategies that advance human capital development, create an enticing investment climate that attracts high-value investments and improve institutional quality levels.

This study contributes to the existing literature because, compared to previous studies that focussed on estimating the conditional mean of the explanatory variable on the poverty rate. It rather provides a more comprehensive understanding of the quantiles of interest of FDI inflows and institutional quality on the Indonesian poverty rate, allowing for more targeted policies.

The peer review history for this article is available at: https://publons.com/publon/10.1108/IJSE-09-2023-0733