World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 31
... relationship that might be found in a mental model of the corresponding part of the world system . The formal model ... relationships chosen for inclusion are important , that the omitted relationships are less important , and the " real ...
... relationship that might be found in a mental model of the corresponding part of the world system . The formal model ... relationships chosen for inclusion are important , that the omitted relationships are less important , and the " real ...
Page 35
... relationship such as the one sketched in Figure 3-1 represents the effect of one system input only - the influence of material standard of living on the birth rate . The relationship is most easily interpreted by assuming that all other ...
... relationship such as the one sketched in Figure 3-1 represents the effect of one system input only - the influence of material standard of living on the birth rate . The relationship is most easily interpreted by assuming that all other ...
Page 65
... relationship in Figure 3-22 is introduced to keep the quality of life from material and the quality of life from food in a reasonable relationship to each other . The output CIQR from this figure enters the computation for the capital ...
... relationship in Figure 3-22 is introduced to keep the quality of life from material and the quality of life from food in a reasonable relationship to each other . The output CIQR from this figure enters the computation for the capital ...
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