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نموذج نظري إسلامي داخلي الزمن للحساب الجاري
[Islamic Theoretical Intertemporal Model of the Current Account]

Author

Listed:
  • Ghassan, Hassan B.
  • Al-Jefri, Essam H.

Abstract

This paper aims to develop an Islamic intertemporal model of the current account based on the prevailing theoretical and empirical literature of PVMCA (Obstfeld and Rogoff 1996, Cerrato et al. 2014). The proposed model is based on the budget constraint of the present and future consumption, which depend on the obligatory Zakat from the income and assets, the return rate on the owned assets, the inheritance linking previous to subsequent generation. Using logarithmic utility function, featured by an unitary elasticity of intertemporal substitution and an unitary coefficient of relative risk aversion, we show through Euler equation of consumption that there is an inverse relationship between consumption growth from the last age to first one and the Zakat rate on assets. The outcomes of this result are that the Zakat on assets disciplines the consumer to have more rationality in consumption, and allows additional marginal assets for future generations. By assuming an unitary subjective discount rate, we indicate that more the return rate on assets is high, more the consumption growth between today and tomorrow will be fast. Through the budget constraint, if Zakat rate on the Zakatable assets is greater than Zakat rate on income, this leads to a relative expansion in private consumption of the wealthy group. Besides, we point out that an increase in return rate on assets, can drive to increasing or decreasing current consumption, because the substitution and income effects work in opposite ways. يهدف البحث إلى صياغة إسلامية لنموذج داخلي الزمن للحساب الجاري انطلاقا من النموذج النظري داخلي الزمن السائد في أدبيات الاقتصاد التحليلي والتطبيقي (Obstfeld and Rogoff 1996, Cerrato et al. 2014). يعتمد النموذج المقترح على صياغة قيد الميزانية للإستهلاك الحاضر والمستقبلي وذلك على أساس فرضية الزكاة على الدخل والأصول وعائد التوظيف المالي للأصول الممتلكة وفرضية عدم ترك الذرية عالة على المجتمع لربط الجيل السابق بالجيل اللاحق. باستخدام دالة المنفعة اللوغاريتمية والتي تتسم بأحادية مرونة الاستبدال الداخلي الزمن في الاستهلاك وبأحادية معامل نبذ المخاطرة النسبية، نبين عبر معادلة Euler للإستهلاك وجود علاقة عكسية بين نمو الاستهلاك بين آخر العمر وأوله من جهة، ومعدل الزكاة على الأصول من جهة أخرى. ويتضح من هذه النتيجة أن الزكاة على الأصول تساعد وتؤدب المستهلك على الرشد في الاستهلاك، كما تتيح أصولا حدية إضافية للأجيال المقبلة. وعند افتراض أحادية معامل التفضيل الزمني، نبين أنه كلما كان معدل العائد على الأصول مرتفع، سيكون نمو الاستهلاك بين اليوم والغد سريعا. وتبعا لمعادلة قيد الميزانية، إذا كان معدل الزكاة على الأصول القابلة للزكاة أكبر من معدل الزكاة على الدخل، فيؤدي إلى توسيع نسبي في الاستهلاك خاصة لدى الفئة الغنية. ونشير أيضا إلى أن زيادة معدل العائد على الأصول، يمكن أن يؤدي إلى زيادة أو انخفاض الاستهلاك الجاري، لأن أثري الاستبدال والدخل يعملان في اتجاهات عكسية.

Suggested Citation

  • Ghassan, Hassan B. & Al-Jefri, Essam H., 2015. "نموذج نظري إسلامي داخلي الزمن للحساب الجاري [Islamic Theoretical Intertemporal Model of the Current Account]," MPRA Paper 69963, University Library of Munich, Germany, revised 11 Jan 2016.
  • Handle: RePEc:pra:mprapa:69963
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    References listed on IDEAS

    as
    1. Maurice Obstfeld & Kenneth S. Rogoff, 1996. "Foundations of International Macroeconomics," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262150476, December.
    2. Ahmed, Habib, 2001. "Exchange Rate Stability: Theory and Policies from an Islamic Perspective (Research Paper)," Occasional Papers 53, The Islamic Research and Teaching Institute (IRTI).
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    5. Mirakhor, Abbas & Zaidi, Iqbal, 1988. "Stabilization and Growth in an Open Islamic Economy," MPRA Paper 56003, University Library of Munich, Germany.
    6. Hossein Askari & Noureddine Krichene & Abbas Mirakhor, 2014. "On the Stability of an Islamic Financial System," PSL Quarterly Review, Economia civile, vol. 67(269), pages 131-167.
    7. Weil, Philippe, 1989. "Overlapping families of infinitely-lived agents," Journal of Public Economics, Elsevier, vol. 38(2), pages 183-198, March.
    8. Kim, Soyoung & Kim, Sunghyun H. & Wang, Yunjong, 2006. "Financial integration and consumption risk sharing in East Asia," Japan and the World Economy, Elsevier, vol. 18(2), pages 143-157, March.
    9. Hoffmann, Mathias, 2013. "What drives China's current account?," Journal of International Money and Finance, Elsevier, vol. 32(C), pages 856-883.
    10. Mario Cerrato & Huseyin Kalyoncu & Naveed Hassan Naqvi & Christopher Tsoukis, 2015. "Current Accounts in the Long Run and the Intertemporal Approach: A Panel Data Investigation," The World Economy, Wiley Blackwell, vol. 38(2), pages 340-359, February.
    Full references (including those not matched with items on IDEAS)

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    More about this item

    Keywords

    Current account; Intertemporal Islamic Model; Smoothed Consumption; Zakat; Utility;
    All these keywords.

    JEL classification:

    • D11 - Microeconomics - - Household Behavior - - - Consumer Economics: Theory
    • D9 - Microeconomics - - Micro-Based Behavioral Economics
    • F21 - International Economics - - International Factor Movements and International Business - - - International Investment; Long-Term Capital Movements
    • Z12 - Other Special Topics - - Cultural Economics - - - Religion

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