Islamic and capitalist economies: Comparison using econophysics models of wealth exchange and redistribution

Abstract

Islamic and capitalist economies have several differences, the most fundamental being that the Islamic economy is characterized by the prohibition of interest (riba) and speculation (gharar) and the enforcement of Shariah-compliant profit-loss sharing (mudaraba, murabaha, salam, etc.) and wealth redistribution (waqf, sadaqah, and zakat). In this study, I apply new econophysics models of wealth exchange and redistribution to quantitatively compare these characteristics to those of capitalism and evaluate wealth distribution and disparity using a simulation. Specifically, regarding exchange, I propose a loan interest model representing finance capitalism and riba and a joint venture model representing shareholder capitalism and mudaraba; regarding redistribution, I create a transfer model representing inheritance tax and waqf. As exchanges are repeated from an initial uniform distribution of wealth, wealth distribution approaches a power-law distribution more quickly for the loan interest than the joint venture model; and the Gini index, representing disparity, rapidly increases. The joint venture model's Gini index increases more slowly, but eventually, the wealth distribution in both models becomes a delta distribution, and the Gini index gradually approaches 1. Next, when both models are combined with the transfer model to redistribute wealth in every given period, the loan interest model has a larger Gini index than the joint venture model, but both converge to a Gini index of less than 1. These results quantitatively reveal that in the Islamic economy, disparity is restrained by prohibiting riba and promoting reciprocal exchange in mudaraba and redistribution through waqf. Comparing Islamic and capitalist economies provides insights into the benefits of economically embracing the ethical practice of mutual aid and suggests guidelines for an alternative to capitalism.

arXiv comment17 pages, 7 figures

References in corpus (8)

• Power laws, Pareto distributions and Zipf's law
• Colloquium: Statistical mechanics of money, wealth, and income
• Pareto Law in a Kinetic Model of Market with Random Saving Propensity
• Kinetic Exchange Models for Income and Wealth Distributions
• Distributions of money in model markets of economy
• Microeconomics of the ideal gas like market models
• Regional Inequality Simulations Based on Asset Exchange Models with Exchange Range and Local Support Bias
• Wealth disparities and economic flow: Assessment using an asset exchange model with the surplus stock of the wealthy

Cited by in corpus (2)

• Wealth Redistribution and Mutual Aid: Comparison using Equivalent/Nonequivalent Exchange Models of Econophysics
• WE economy: Potential of mutual aid distribution based on moral responsibility and risk vulnerability