A unified framework for the pareto law and Matthew effect using scale-free networks M.-B. Hu, W.-X. Wang, R. Jiang, Q.-S. Wu, B.-H. Wang and Y.-H. Wu Eur. Phys. J. B, 53 2 (2006) 273-277 Published online: 06 October 2006 DOI: 10.1140/epjb/e2006-00365-8