World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 62
... reached zero . The quality of life QL is computed as the product of the separate components . This means that a zero component from food would reduce the entire quality of life value to zero , regardless of the values of other ...
... reached zero . The quality of life QL is computed as the product of the separate components . This means that a zero component from food would reduce the entire quality of life value to zero , regardless of the values of other ...
Page 102
... reached . The effect of a 30 % reduction in world - wide birth rate ( other things being equal ) is to delay by one generation the time when 8 billion population is reached . In Figure 5-5 the capital investment rises somewhat more ...
... reached . The effect of a 30 % reduction in world - wide birth rate ( other things being equal ) is to delay by one generation the time when 8 billion population is reached . In Figure 5-5 the capital investment rises somewhat more ...
Page 113
... reaching equilibrium have in the past been relieved by escape of people to new land areas . But that escape is becoming less possible . Until now we have had , in effect , an inexhaustible supply of farm land and food - growing ...
... reaching equilibrium have in the past been relieved by escape of people to new land areas . But that escape is becoming less possible . Until now we have had , in effect , an inexhaustible supply of farm land and food - growing ...
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