World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 6
Jay W. Forrester, Jay Wright Forrester. Food ratio 0.5 1.0 1.5 1 2 3 5 Agricultural land units / person Figure 1-3 Food ratio ( adequacy ) as it depends on agricultural land units ... Food ratio 50 Years 0 Millions of people 1 2 6 Chapter ...
Jay W. Forrester, Jay Wright Forrester. Food ratio 0.5 1.0 1.5 1 2 3 5 Agricultural land units / person Figure 1-3 Food ratio ( adequacy ) as it depends on agricultural land units ... Food ratio 50 Years 0 Millions of people 1 2 6 Chapter ...
Page 46
... food regulates birth and death rates so that population maintains its precarious exis- tence at the maximum number of people that the available food can sustain . Figure 3-8 shows the relationship between birth rate and food ratio that ...
... food regulates birth and death rates so that population maintains its precarious exis- tence at the maximum number of people that the available food can sustain . Figure 3-8 shows the relationship between birth rate and food ratio that ...
Page 47
... RATIO ( DIMENSIONLESS ) 60 60 3.19 Food Ratio FR The food ratio gives the food per capita in terms of the average for the world in 1970. It is a dimensionless ratio obtained by dividing the food potential from capital investment FPCI by the ...
... RATIO ( DIMENSIONLESS ) 60 60 3.19 Food Ratio FR The food ratio gives the food per capita in terms of the average for the world in 1970. It is a dimensionless ratio obtained by dividing the food potential from capital investment FPCI by the ...
Contents
Introduction | 1 |
Structure of the World System | 17 |
A World Model Structure and Assumptions | 31 |
Copyright | |
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Common terms and phrases
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