La technologie blockchain est un réseau distribué sur des machines décentralisées qui permet d’effectuer et de valider des transactions. Le terme blockchain recouvre des usages divers sur le marché bancaire depuis quelques années. En considérant l’architecture de la blockchain et l’infrastructure bancaire, nous clarifions les utilisations de ces technologies à partir des différences entre registre distribué (DLT) et blockchain . Nous présentons les obstacles créés par les blockchains publiques et les apports des blockchains privées afin de mieux cerner leurs possibilités d’adoption dans l’environnement bancaire. Nous mettons aussi en lumière l’émergence des DLT avec permission et leur rôle dans le développement du système bancaire. Les expérimentations des DLT avec permission ( Madre , Corda et Libra ) nous permettent d’illustrer les pratiques en cours. Il ressort de l’analyse que la DLT de consortium est le prototype le plus adapté actuellement pour répondre aux besoins et aux contraintes du marché bancaire. Classification JEL : F41, G21, L15, O33, P13

This paper examines the asymmetric impact of recent oil price fluctuations on stock markets in the Gulf Cooperation Council (GCC) region from 2019 to 2024, a period marked by the COVID-19 pandemic and the prolonged Ukrainian crisis. Using the Nonlinear Autoregressive Distributed Lag (NARDL) and an enhanced Multiple Threshold Nonlinear Autoregressive Distributed Lag (MTNARDL) framework, the study examines whether extreme positive and negative shocks in oil prices, S&P 500, Bitcoin, and gold induce heterogeneous transmission effects on GCC equity indices. The empirical findings show that both extreme positive and negative oil price shocks exert a stronger and more persistent influence on GCC stock markets than fluctuations in global equities, cryptocurrencies, or precious metals. This confirms the dominant role of oil as a key driver of financial dynamics in oil-dependent economies, particularly during periods of heightened uncertainty. The main contribution of this study lies in the improvement of the MTNARDL specification, which allows for a clearer identification of tail-risk behavior and asymmetric volatility spillovers. The enhanced model captures multi-threshold nonlinearities more effectively than conventional approaches, offering a robust framework for policymakers and investors to better understand shock transmission mechanisms in hydrocarbon-based markets.

Cette thèse propose trois essais contribuant à déterminer les opportunités et les défis des technologies blockchain et des crypto-monnaies, afin de comprendre leur possibilité d’adoption dans le système bancaire et l’économie en général. Tout d’abord, nous avons montré, à travers une revue de littérature, des expérimentations pratiques, et une analyse comparative des différentes plateformes de DLT existantes, que les DLT alternative de consortium sont les prototypes qui devraient prédominer dans le système bancaire à l’avenir. Ensuite, nous avons mis en évidence la résistance et la résilience des principaux systèmes de récompenses utilisés par les pools de minage face aux événements du halving de Bitcoin. Cette comparaison est complétée par des calculs supplémentaires qui enrichissent véritablement l’analyse des décisions et des comportements des mineurs rejoignant un pool. Enfin, nous avons développé une solution de tokenisation adaptée pour le Liban, visant à assurer une reprise économique, tout en abordant le contexte économique tumultueux du pays et en étudiant les défis des solutions numériques existantes

Sustainable construction adoption in developing economies is often discussed in terms of financial, regulatory, and institutional barriers, while the organizational capabilities required for implementation have received less attention. This study examines the associations between key organizational and external factors and the adoption of sustainable construction practices in Jordan using partial least squares structural equation modeling (PLS-SEM) and the Technology–Organization–Environment (TOE) framework. Data were collected through a cross-sectional questionnaire completed by 192 contractors, consultants, developers, and other construction professionals. Financial Barriers, Economic Support, Regulatory Support, Human Capacity, and Technological Readiness were modeled as antecedents of adoption, while Perceived Sustainability Value (PSV) was modeled as the outcome. Human Capacity (β = 0.273, p = 0.001) and Technological Readiness (β = 0.300, p = 0.002) were positively associated with adoption, whereas Financial Barriers, Economic Support, and Regulatory Support were not statistically significant in the full model. Adoption was positively associated with PSV (β = 0.563, p < 0.001). The model accounted for 44.5% and 31.7% of the variance in adoption and PSV, respectively. The findings distinguish between barriers identified by practitioners as important and organizational capabilities most strongly associated with reported implementation. Strengthening training, technical expertise, equipment, and access to appropriate technologies may support sustainable construction adoption in Jordan. Because the data are cross-sectional and self-reported, the results are interpreted as associations rather than causal effects.

Purpose: This study aims to examine how tokenized remittance infrastructure can be governed in crisis-affected economies where domestic financial institutions have lost credibility. Existing studies often examine cryptocurrencies, stablecoins and Central Bank Digital Currencies (CBDCs) as separate instruments, with less attention to how remittance-focused tokenization can be governed under crisis conditions. Focusing on Lebanon, the study develops a compliance-by-design framework built around CedarWave (CDW), a USD-indexed payment token and CedarSave (CDS), a micro-savings token linked to balance retention and liquidity recycling. Design/methodology/approach: The study adopts a qualitative, design-oriented approach combining comparative case analysis, regulatory mapping and Design Science Research (DSR), structured around four explicit research questions and a formal DSR artifact-evaluation cycle. It compares cryptocurrency, stablecoin and CBDC experiences in selected crisis or weak-institution contexts and uses these insights to develop and conceptually evaluate a Lebanon-specific tokenized remittance model. The evaluation is scenario-based and conceptual rather than empirical; no field pilot, expert validation or quantitative simulation was conducted. Findings: The analysis shows that unregulated cryptocurrencies reveal demand for alternatives to failed financial channels but remain constrained by volatility, informality, consumer-protection concerns and compliance risks. CBDC-based approaches face trust, usability and implementation barriers in weak-institution environments. Regulated stablecoin-based models offer a more practical intermediate pathway, provided they are supported by credible reserves, redemption rights, AML/KYC controls, consumer protection and external regulatory anchoring. These findings are design propositions derived from comparative and conceptual analysis rather than demonstrated empirical results. Originality/value: The study’s contribution is modest and specific rather than broad: it applies and synthesizes established stablecoin-governance and compliance-by-design concepts, which are not novel in themselves, to a Lebanon-specific remittance-corridor problem, and it separates payment stability from savings incentives through an explicit dual-token design. The originality lies in the Lebanon-specific regulatory anchoring logic and the remittance-corridor governance model, not in the underlying token architecture, which resembles existing regulated stablecoin-plus-governance-token designs. The study contributes to digital policy, regulation and governance research by reframing remittances as governed payment infrastructure rather than only private transfers. It proposes a conceptual dual-token architecture linking blockchain settlement with MiCA- and UAE-oriented safeguards, proof-of-reserves, Travel Rule compliance, transaction monitoring and circuit breakers. The framework proposes a conceptual evaluation structure, organized around governance quality, compliance coverage, settlement efficiency and user protection, to guide future empirical testing rather than reporting results from applied testing here.