AGGREGATION OF VARIABLES IN DYNAMICAL SYSTEMS Open PDF Document Details Document Type Technical Report Publication Date Jul 01, 1955 Accession Number AD0089516 Entities People Herbert Simon Organizations Carnegie Institute of Technology Tags Communities of Interest Materials and Manufacturing Processes DTIC Thesaurus Topics Contracts Differential Equations Directives Economic Policy Equations Governments Input Output Models Insulation Models Probability Specifications Thermal Insulation Transitions