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Structure of the World System
A World Model Structure and Assumptions
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1970 conditions accumulation agricultural land assumed assumptions average behavior billion birth rate normal birth-control program BRN1 capital accumulation capital investment CAPITAL UNITS CAPITAL-INVESTMENT DISCARD capital-investment ratio CAPITAL-INVESTMENT-IN-AGRICULTURE FRACTION cause Chapter CIAF CIRA Club of Rome coefficient computer model crowding ratio curve decline dynamic ECIR effect effective-capital-investment ratio environment equations equilibrium exponential growth falling feedback loops food production food ratio food supply FPCI increase industrialization influence INTERPOLATION IONLESS limit LOGICAL FUNCTION material standard mental models mode MULTIPLIER DIMENSIONLESS natural resources natural-resource-usage rate negative loop NREM NRUN1 pollution absorption pollution crisis pollution POL pollution ratio POLR POLLUTION UNITS pollution-absorption population and capital population density population growth pressures processes ratio CIR RATIO DIMENSIONLESS ratio in agriculture result Section shortage shows social systems SQUARE KILOMETERS standard of living structure system levels TABHL TABLE LOOK tion unit per person UNITS/PERSON UNITS/PERSON/YEAR UNITS/YEAR usage rate variable world model world population world system