World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 32
... accumulation . Mathematically speaking , the process is one of inte- gration . Population at any point in time is ... accumulated in the system . If the level variables are given , the system rates can be computed from them . Therefore ...
... accumulation . Mathematically speaking , the process is one of inte- gration . Population at any point in time is ... accumulated in the system . If the level variables are given , the system rates can be computed from them . Therefore ...
Page 51
... accumulates per year . The coefficient CIGN , hav- ing a value of 0.05 unit per person per year , describes the normal accumulation rate for 1970 conditions . The multiplier CIM depends on the material standard of living and introduces ...
... accumulates per year . The coefficient CIGN , hav- ing a value of 0.05 unit per person per year , describes the normal accumulation rate for 1970 conditions . The multiplier CIM depends on the material standard of living and introduces ...
Page 52
... accumulation per person per year rises no further after capital accumulation reaches a point where more capital does not contribute to still greater human satisfaction . On the horizontal scale , a value of MSL of 5 would mean a world ...
... accumulation per person per year rises no further after capital accumulation reaches a point where more capital does not contribute to still greater human satisfaction . On the horizontal scale , a value of MSL of 5 would mean a world ...
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