World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 79
... PRESENT ORIGINAL GA GA GA 4353 GA NRUN1 ' .2500 ' 1.000 ' Pollution absorption Figure 4-7 Dynamics of the pollution sector . A positive - feedback growth in pollution occurs when the pollution - absorption time increases faster than the ...
... PRESENT ORIGINAL GA GA GA 4353 GA NRUN1 ' .2500 ' 1.000 ' Pollution absorption Figure 4-7 Dynamics of the pollution sector . A positive - feedback growth in pollution occurs when the pollution - absorption time increases faster than the ...
Page 100
... PRESENT ' ORIGINAL .2500 28.00A 1.000 40.00A Population 2060.- The increase in the quality of life appearing in Figure 5-2 after the intro- duction of the birth - control program is probably a consequence of the simplicity of this world ...
... PRESENT ' ORIGINAL .2500 28.00A 1.000 40.00A Population 2060.- The increase in the quality of life appearing in Figure 5-2 after the intro- duction of the birth - control program is probably a consequence of the simplicity of this world ...
Page 103
... PRESENT ORIGINAL NRUN1 POLN1 BRN1 0 . 1.000 1000 1.000 20.00A 40.00A Material standard of living 2060.- and the food ratio that result from the severe reduction in birth rate . Comparisons should be made between Figures 4-9 , 4-10 , 5-5 ...
... PRESENT ORIGINAL NRUN1 POLN1 BRN1 0 . 1.000 1000 1.000 20.00A 40.00A Material standard of living 2060.- and the food ratio that result from the severe reduction in birth rate . Comparisons should be made between Figures 4-9 , 4-10 , 5-5 ...
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