World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 8
... processes of Figures 1-4 and 1-5 take effect , the agricultural surplus available for export will decline . After the export buffer has been diverted to internal use , the full signifi- cance of Figure 1-5 will become apparent . For ...
... processes of Figures 1-4 and 1-5 take effect , the agricultural surplus available for export will decline . After the export buffer has been diverted to internal use , the full signifi- cance of Figure 1-5 will become apparent . For ...
Page 79
... processes that have already been observed seem to have this character . The eutrophication of lakes progresses to a point where the purifying processes no longer keep up with rising contamination . In oceans and forests , sufficient ...
... processes that have already been observed seem to have this character . The eutrophication of lakes progresses to a point where the purifying processes no longer keep up with rising contamination . In oceans and forests , sufficient ...
Page 85
... processes of the kind seen in the pollution sector . Neither are there any time delays between crowding and the effect on population growth . These omissions of factors that might be found in actual systems accounts for the smooth ...
... processes of the kind seen in the pollution sector . Neither are there any time delays between crowding and the effect on population growth . These omissions of factors that might be found in actual systems accounts for the smooth ...
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