World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 44
... square kilometer for the world as a whole . The resulting ratio is in terms of 1970 crowding . A value of 1 is the ... square kilometers , and the 1970 average population density normal PDN is 26.5 people per square kilometer . CR.K ...
... square kilometer for the world as a whole . The resulting ratio is in terms of 1970 crowding . A value of 1 is the ... square kilometers , and the 1970 average population density normal PDN is 26.5 people per square kilometer . CR.K ...
Page 45
... ( SQUARE KILOMETERS ) POPULATION DENSITY NORMAL ( PEOPLE / SQUARE KILOMETER ) 3.16 Birth - Rate - from - Crowding Multiplier BRCM Figure 3-7 is the estimated effect of crowding on birth rate . The multiplier has a value of 1 for 1970 ...
... ( SQUARE KILOMETERS ) POPULATION DENSITY NORMAL ( PEOPLE / SQUARE KILOMETER ) 3.16 Birth - Rate - from - Crowding Multiplier BRCM Figure 3-7 is the estimated effect of crowding on birth rate . The multiplier has a value of 1 for 1970 ...
Page 140
... ( SQUARE KILOMETERS ) MATERIAL STANDARD OF LIVING ( DIMENSIONLESS ) NATURAL RESOURCES ( NATURAL RESOURCE UNITS ) ... KILOMETER ) POPULATION , INITIAL ( PEOPLE ) PLOT SWITCH TIME ( YEARS ) PLOT PERIOD NO . 1 ( YEARS ) PLTP2 PLOT PERIOD NO . 2 ...
... ( SQUARE KILOMETERS ) MATERIAL STANDARD OF LIVING ( DIMENSIONLESS ) NATURAL RESOURCES ( NATURAL RESOURCE UNITS ) ... KILOMETER ) POPULATION , INITIAL ( PEOPLE ) PLOT SWITCH TIME ( YEARS ) PLOT PERIOD NO . 1 ( YEARS ) PLTP2 PLOT PERIOD NO . 2 ...
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