In order to determine the effects of the rates of single-chain folding and multi-chain aggregation, solvent quality, and backbone stiffness on the final aggregate structure, we examined the folding of a number of isolated single-chain systems of various molecular weights as a function of backbone stiffness and solvent quality, as well as multi-chain systems representative of the experimen-tal systems studied in ref. 10. All simulations were conducted at constant volume and temperature using Langevin dynamics.