World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 6
... further by only another factor of four while agricultural land declines further by 62 % . For the first time , occupancy land is encroaching on land that is needed for food . Popula- tion is rising and , at the " crisis level , " begins ...
... further by only another factor of four while agricultural land declines further by 62 % . For the first time , occupancy land is encroaching on land that is needed for food . Popula- tion is rising and , at the " crisis level , " begins ...
Page 9
... further , the world is unable to sustain the peak population . Population then declines along with capital investment . Quality of life depends on material standard of living , food supply , crowding , and pollution . Quality of life in ...
... further , the world is unable to sustain the peak population . Population then declines along with capital investment . Quality of life depends on material standard of living , food supply , crowding , and pollution . Quality of life in ...
Page 52
... further in- crease in the capital pool . Figure 3-12 gives the capital - investment multiplier CIM in terms of the material standard of living MSL . Both MSL and CIM have values of 1 for 1970 conditions . At zero capital investment ...
... further in- crease in the capital pool . Figure 3-12 gives the capital - investment multiplier CIM in terms of the material standard of living MSL . Both MSL and CIM have values of 1 for 1970 conditions . At zero capital investment ...
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