World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 33
... defined here , is the total rate at which people are being added to the popula- tion . It is measured in people per year . In demography , “ birth rate " is more often defined as the rate per thousand of population , or the births as a ...
... defined here , is the total rate at which people are being added to the popula- tion . It is measured in people per year . In demography , “ birth rate " is more often defined as the rate per thousand of population , or the births as a ...
Page 36
... defined as the capital investment available per person in 1970. Thus by definition , the value of ECIRN is 1 capital unit per person . The relationship has no numerical effect on the value from ECIR but maintains the intended dimensions ...
... defined as the capital investment available per person in 1970. Thus by definition , the value of ECIRN is 1 capital unit per person . The relationship has no numerical effect on the value from ECIR but maintains the intended dimensions ...
Page 38
... defined here , natural resources include only those nonreplaceable materials in the earth . They do not include wood ... define the natural- resource - usage rate NRUR in 1970 as being 1 natural resource unit per person . This is the ...
... defined here , natural resources include only those nonreplaceable materials in the earth . They do not include wood ... define the natural- resource - usage rate NRUR in 1970 as being 1 natural resource unit per person . This is the ...
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