World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 22
... increase of 1.2 % per year . These rates are called " normal " rates because they correspond to a standard set of world conditions when the values of food , material standard of living , crowding , and pollution are all at their “ stan ...
... increase of 1.2 % per year . These rates are called " normal " rates because they correspond to a standard set of world conditions when the values of food , material standard of living , crowding , and pollution are all at their “ stan ...
Page 23
... increase in the material standard of living , and the generation rate of new capital no longer rises with higher levels of capital . Examining the positive loop in Figure 2-3 , we see that an increase in capital investment CI increases ...
... increase in the material standard of living , and the generation rate of new capital no longer rises with higher levels of capital . Examining the positive loop in Figure 2-3 , we see that an increase in capital investment CI increases ...
Page 25
... increases , the pollution- absorption time POLAT increases ; this reduces the rate of pollution absorption POLA , and tends to increase pollution POL . So an increase in pollution , traced around the loop , produces a still further increase ...
... increases , the pollution- absorption time POLAT increases ; this reduces the rate of pollution absorption POLA , and tends to increase pollution POL . So an increase in pollution , traced around the loop , produces a still further increase ...
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
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Common terms and phrases
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