World Dynamics1971 |
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Page 26
... Population DR Death rate 10 CR Crowding 15 ratio 1 DRCM DRCMT 14 Death - rate - from- crowding multiplier Figure 2-5 Negative loops that adjust crowding of ... Population Birth - rate -. 26 Chapter Two Population Controlled by Food Supply.
... Population DR Death rate 10 CR Crowding 15 ratio 1 DRCM DRCMT 14 Death - rate - from- crowding multiplier Figure 2-5 Negative loops that adjust crowding of ... Population Birth - rate -. 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 76
... population is divided into the total capital investment . If population drops suddenly , the model formulation assumes that the capital is available and used by the remaining population . This is equiva- lent to assuming that the population ...
... population is divided into the total capital investment . If population drops suddenly , the model formulation assumes that the capital is available and used by the remaining population . This is equiva- lent to assuming that the population ...
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
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1970 conditions accumulation agricultural land assumed assumptions behavior birth rate normal birth-control program BRFM BRMM BRN1 capital investment CAPITAL UNITS CAPITAL UNITS/PERSON CAPITAL-INVESTMENT DISCARD capital-investment multiplier capital-investment ratio CAPITAL-INVESTMENT-IN-AGRICULTURE FRACTION cause Chapter CIAF CIGN1 Club of Rome coefficient computer model crowding ratio curve death rate normal decline DRFM dynamic ECIR effect effective-capital-investment ratio equations equilibrium exponential growth food production food ratio food supply FPMT FRACTION/YEAR in-agriculture fraction increase industrialization INTERPOLATION limit LOGICAL FUNCTION material standard mental models MULTIPLIER DIMENSIONLESS natural resources natural-resource Natural-resource-usage rate negative loop NR=N NREM NREMT NRUN1 POLN1 POLAT POLCM pollution absorption pollution crisis pollution-absorption population and capital population density PRESENT ORIGINAL pressures ratio CIR RATIO DIMENSIONLESS result rise Section sector shortage social systems SQUARE KILOMETERS standard of living system levels TABHL TABLE LOOK TIME.K tion units per person UNITS/PERSON/YEAR UNITS/YEAR usage rate variable world model world population world system