World DynamicsThe "system dynamics" approach to economics as developed at MIT. |
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Page 37
... agriculture and that used for all other purposes . Therefore , the fraction of capital not used in agriculture ( 1 - CIAF ) is multiplied at this point . CIAF is the variable fraction of capital that is allocated to agriculture . ECIR ...
... agriculture and that used for all other purposes . Therefore , the fraction of capital not used in agriculture ( 1 - CIAF ) is multiplied at this point . CIAF is the variable fraction of capital that is allocated to agriculture . ECIR ...
Page 48
... agriculture into marginal areas . At very low world population , we would expect people to cluster near the most productive agricultural areas . The figure represents the intrinsic nature of the land as well as reduction in the land ...
... agriculture into marginal areas . At very low world population , we would expect people to cluster near the most productive agricultural areas . The figure represents the intrinsic nature of the land as well as reduction in the land ...
Page 49
... agriculture will be a major influence on the capability for producing food . Capital investment means here more than farm machinery . It includes fertilizer plants , irrigation systems , and the food processing and distribution systems ...
... agriculture will be a major influence on the capability for producing food . Capital investment means here more than farm machinery . It includes fertilizer plants , irrigation systems , and the food processing and distribution systems ...
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