• Expectations Hypothesis Revisited 

      Chakraborty, Nilanjana; Elgammal, Mohammed; McMillan, David G. ( Elsevier , 2023 , Article)
      In this paper we study the three academically prevalent versions of the Log form of the Expectations Hypothesis (LEH) for the long-term zero-coupon treasury bond yields using the level variables and find clear affirmation ...
    • Forward Premium Anomaly Resolved 

      Chakraborty, Nilanjana; Elgammal, Mohammed; McMillan, David G. ( Elsevier , 2023 , Article)
      This paper propounds that the Forward Premium Anomaly (FPA) arises due to misspecification in the extant empirical models, where ratios of the concerned variables are studied instead of their levels themselves. We study ...
    • THE LEVERAGE EFFECT ON THE VALUE PREMIUM VOLATILITY: FROM AN INTERNATIONAL PERSPECTIVE 

      Elgammal, Mohammed; Al-Najjar, Basil ( Qatar University , 2015 , Article)
      This paper investigates the leverage effect on the value premium volatility using GARCH and TARCH models utilizing a unique dataset, for twenty nine countries. The findings show that value premium returns are bigger in ...
    • A more sustainable future: Can politically connected CEOs spur the nexus between ESG performance and firm financial performance? 

      Mohamed, Marie; Qi, Baolei; Elgammal, Mohammed; Elnahass, Marwa ( Elsevier , 2024 , Article)
      This study examines how politically connected CEOs moderate the relationship between ESG and financial performance in Chinese A-share listed companies from 2015 to 2022. The results demonstrate that companies with strong ...
    • Option Pricing Simplified 

      Chakraborty, Nilanjana; Elgammal, Mohammed ( Elsevier , 2023)
      Here we present three option-pricing models, one based on the underlying asset and two based on indices that are averages of the prices of options having same particulars but different strike prices. These models estimate ...
    • The Perceptions of Closing Islamic Windows within the Conventional Banks in Qatar and its influence on the Bank Performance 

      Elgammal, Mohammed; Al Bakri, Anas; Alshami, Abdullah (2021 , Article)
      This study explored the perceptions of customers and bankers in Qatar regarding the impact of closing Islamic windows on banks performance. Furthermore the study objective expands to analyze what changes happened to the ...
    • Political Connections and Capital Structure in the GCC Banks 

      Ahmed, Fatma; Elgammal, Mohammed ( World Scientific Publishing Co. , 2024 , Book chapter)
      This chapter investigates the impact of political connections on capital structure choices in GCC banks. Applying the generalized method of moments (GMM) shows that neither the pecking order theory nor the trade-off theory ...
    • Terrorist attacks and bank financial stability: evidence from MENA economies 

      Elnahass, Marwa; Marie, Mohamed; Elgammal, Mohammed ( Springer Nature Switzerland AG. , 2022 , Article)
      This study examines the impact of terrorism on bank stability, represented by bank risk and financial performance. We consider banks from 14 countries located in the Middle East and North Africa region for the period ...
    • The Effects of Innovation Dimensions on Small and Entrepreneurship Business Performance in Emerging Markets: Evidence from Qatar 

      Al Bakri, Anas; Elgammal, Mohammed ( Inderscience Publishers , 2022 , Article)
      This study examines the effects of different innovation dimensions, namely financial, input, process, and output innovations on the small and entrepreneurship business (SEB) financial, organisational, and marketing performance ...