World Dynamics1971 |
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Page 18
... discussed in later sections . Within the feedback loops of a system , the principles of system structure tell us that two kinds of variables will be found - levels and rates . The levels are the accumulations ( integrations ) within the ...
... discussed in later sections . Within the feedback loops of a system , the principles of system structure tell us that two kinds of variables will be found - levels and rates . The levels are the accumulations ( integrations ) within the ...
Page 33
... discussed in connection with birth rate . Birth rate normal BRN in the model is not equivalent to the demographic " births per thousand " unless the birth - rate multipliers all have unity values . Generally speaking the multipliers ...
... discussed in connection with birth rate . Birth rate normal BRN in the model is not equivalent to the demographic " births per thousand " unless the birth - rate multipliers all have unity values . Generally speaking the multipliers ...
Page 39
... discussed in Section 3.2 in connection with birth rate . Basic death rate is population P multiplied by the death rate normal DRN . But the actual death rate , like the birth rate , depends on conditions in other parts of the world ...
... discussed in Section 3.2 in connection with birth rate . Basic death rate is population P multiplied by the death rate normal DRN . But the actual death rate , like the birth rate , depends on conditions in other parts of the world ...
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