World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 26
... Population CR 15 Crowding ratio DR Death rate 10 DRCM DRCMT 14 Death - rate - from- crowding multiplier Figure 2-5 Negative loops that adjust crowding ... Population DR Death rate 10 Birth. 26 Chapter Two Population Controlled by Food Supply.
... Population CR 15 Crowding ratio DR Death rate 10 DRCM DRCMT 14 Death - rate - from- crowding multiplier Figure 2-5 Negative loops that adjust crowding ... Population DR Death rate 10 Birth. 26 Chapter Two Population Controlled by Food Supply.
Page 27
... population to the maximum that food can support . reversal of impact - where a rise in population tends eventually to produce a downward influence on population - identifies a negative loop , one which is ad- justing birth rate to ...
... population to the maximum that food can support . reversal of impact - where a rise in population tends eventually to produce a downward influence on population - identifies a negative loop , one which is ad- justing birth rate to ...
Page 124
... population control becomes effective . But the process of buying time reduces the pressures that force population control . Any proposed program for the future must deal with both the quality of life and the factors affecting population ...
... population control becomes effective . But the process of buying time reduces the pressures that force population control . Any proposed program for the future must deal with both the quality of life and the factors affecting population ...
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