Nunes Amaral, Luís A.Buldyrev, Sergey V.Havlin, ShlomoSalinger, Michael A.Stanley, H. Eugene2020-03-262020-03-261998-02-16Luís A. Nunes Amaral, Sergey V. Buldyrev, Shlomo Havlin, Michael A. Salinger, H. Eugene Stanley. 1998. "Power law scaling for a system of interacting units with complex internal structure." PHYSICAL REVIEW LETTERS, Volume 80, Issue 7, pp. 1385 - 1388. https://doi.org/10.1103/PhysRevLett.80.13850031-9007https://hdl.handle.net/2144/39819We study the dynamics of a system composed of interacting units each with a complex internal structure comprising many subunits and treat the case in which each subunit grows in a multiplicative manner. We propose a model for such systems in which the interaction among the units is treated in a mean field approximation and the interaction among subunits is nonlinear. We test the model and find agreement between our predictions and empirical results based on a large economics database spanning 20 years.p. 1385 - 1388.en-US©1998 American Physical Society.Science & technologyPhysical sciencesPhysics, multidisciplinaryPhysicsFirm growthBehaviorGeneral physicsArticle10.1103/PhysRevLett.80.138594815