World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 31
... assumptions within the theory become visible . The assump- tions can then be criticized . They can be compared with the assumptions in alternative proposed theories . Data and observations can be used to improve the assumptions . A ...
... assumptions within the theory become visible . The assump- tions can then be criticized . They can be compared with the assumptions in alternative proposed theories . Data and observations can be used to improve the assumptions . A ...
Page 32
... assumptions and rela- tionships for plausibility . If he were to engage in extending and refining the model , he would want to test his alternate hypotheses by altering the assumptions given here to determine which changes in assumptions ...
... assumptions and rela- tionships for plausibility . If he were to engage in extending and refining the model , he would want to test his alternate hypotheses by altering the assumptions given here to determine which changes in assumptions ...
Page 67
... assumptions about major world forces and their interrelationship in a dynamic model . Such a model constitutes a theory of be- havior and interaction . Few people find the assumptions in Chapter 3 surprising . The assumptions seem to ...
... assumptions about major world forces and their interrelationship in a dynamic model . Such a model constitutes a theory of be- havior and interaction . Few people find the assumptions in Chapter 3 surprising . The assumptions seem to ...
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