World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 5
... space per person are on the verge of combining to generate pressures great enough to reduce birth rate and increase ... space . The clash is thereby accentuated . Consider , as an example , a population that is expanding into a fixed ...
... space per person are on the verge of combining to generate pressures great enough to reduce birth rate and increase ... space . The clash is thereby accentuated . Consider , as an example , a population that is expanding into a fixed ...
Page 48
... space oc- cupied ; and the more occupied space , the less agricultural land is left . Occupancy seems often to use the best land , and so the allotment of land of lower quality for food growing will increase the effect of crowding on ...
... space oc- cupied ; and the more occupied space , the less agricultural land is left . Occupancy seems often to use the best land , and so the allotment of land of lower quality for food growing will increase the effect of crowding on ...
Page 124
... space , natural resources , and agricultural land left . We can avoid the question of rising population as long as we can flee into this bountiful reservoir that nature provided . But the reservoir is limited . Exponential growth cannot ...
... space , natural resources , and agricultural land left . We can avoid the question of rising population as long as we can flee into this bountiful reservoir that nature provided . But the reservoir is limited . Exponential growth cannot ...
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
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1970 conditions assumed assumptions behavior birth rate normal birth-control program BRFM BRN1 capital investment CAPITAL UNITS CAPITAL UNITS/PERSON CAPITAL-INVESTMENT DISCARD capital-investment ratio CAPITAL-INVESTMENT-IN-AGRICULTURE FRACTION Chapter CI=C CIAF CIGN1 Club of Rome computer model crowding ratio curve decline DRFM ECIR effect effective-capital-investment ratio environment equations equilibrium exponential growth food production food ratio food supply FPMT in-agriculture fraction increase industrialization INTERPOLATION Limits to Growth LOGICAL FUNCTION Main Street Cambridge material standard mental models MULTIPLIER DIMENSIONLESS natural resources natural-resource Natural-resource-usage rate negative loop NR=N NREM NREMT NRUN1 POLN1 physical limits physical stress POLAT pollution absorption pollution crisis pollution-absorption population and capital population density PRESENT ORIGINAL pressures processes QL-Q ratio CIR RATIO DIMENSIONLESS rise Section sector shortage social stress social systems standard of living structure system levels TABHL TABLE LOOK tion units per person UNITS/PERSON/YEAR UNITS/YEAR usage rate variable world model world population world system