WOLFRAM SYSTEMMODELER

Human_Fertility

Human fertility

Diagram

Wolfram Language

In[1]:=
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SystemModel["SystemDynamics.WorldDynamics.World3.Human_Fertility"]
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Information

This model estimates the human fertility factor used by the population dynamics model.

The human fertility factor is dimensionless.

Public Parameters (8)

des_compl_fam_size_norm

Value: 3.8

Type: Real

Description: Desired normal complete family size

hlth_serv_impact_del

Value: 20

Type: Real (yr)

Description: Health service impact delay

income_expect_avg_time

Value: 3

Type: Real (yr)

Description: Income expected average time

lifet_perc_del

Value: 20

Type: Real (yr)

Description: Perceived life-time delay

max_tot_fert_norm

Value: 12

Type: Real

Description: Normal maximal total fertility

social_adj_del

Value: 20

Type: Real (yr)

Description: Social adjustment delay

t_fert_cont_eff_time

Value: 4000

Type: Real (yr)

Description: Year of continued fertility change

t_zero_pop_grow_time

Value: 4000

Type: Real (yr)

Description: Time to zero population growth

Connectors (4)

ind_out_pc

Type: MassInPort

Description: Per capita annual industrial output

life_expectancy

Type: MassInPort

Description: Average life expectancy of human population

serv_out_pc

Type: MassInPort

Description: Per capita annual expenditure in services

total_fertility

Type: MassOutPort

Description: Average human fertility

Components (18)

Avg_Ind_Out_PC

Type: SMTH1

Description: p.122 of Dynamics of Growth in a Finite World

Fam_Income_Expect

Type: Fam_Income_Expect

Description: p.122 of Dynamics of Growth in a Finite World

Fam_Resp_To_Soc_Norm

Type: Tabular

Description: p.122 of Dynamics of Growth in a Finite World

Del_Ind_Out_PC

Type: SMTH3

Description: p.119 of Dynamics of Growth in a Finite World

Soc_Fam_Size_Norm

Type: Tabular

Description: p.119 of Dynamics of Growth in a Finite World

Des_Compl_Fam_Size

Type: Des_Compl_Fam_Size

Description: p.113 of Dynamics of Growth in a Finite World

Perc_Life_Expectancy

Type: SMTH3

Description: p.112 of Dynamics of Growth in a Finite World

Compl_Mlt_Perc_Lifet

Type: Tabular

Description: p.112 of Dynamics of Growth in a Finite World

Des_Tot_Fert

Type: Prod_2

Description: p.107 of Dynamics of Growth in a Finite World

Fecundity_Mult

Type: Tabular

Description: p.104 of Dynamics of Growth in a Finite World

Max_Tot_Fert

Type: Gain

Description: p.104 of Dynamics of Growth in a Finite World

Need_For_Fert_Cont

Type: Need_For_Fert_Cont

Description: p.131 of Dynamics of Growth in a Finite World

Fr_Serv_Al_Fert_Cont

Type: Tabular

Description: p.132 of Dynamics of Growth in a Finite World

Fert_Cont_Al_PC

Type: Prod_2

Description: p.132 of Dynamics of Growth in a Finite World

Fert_Cont_Facil_PC

Type: SMTH3

Description: p.133 of Dynamics of Growth in a Finite World

Fert_Cont_Eff_Table

Type: Tabular

Description: p.133 of Dynamics of Growth in a Finite World

Fert_Cont_Eff

Type: Fert_Cont_Eff

Description: p.133 of Dynamics of Growth in a Finite World

Total_Fertility

Type: Total_Fertility

Description: p.97 of Dynamics of Growth in a Finite World

Used in Examples (11)

Scenario_11

SystemDynamics.WorldDynamics.World3

Influencing the future 10 years later

Scenario_10

SystemDynamics.WorldDynamics.World3

Influencing the future 20 years earlier

Scenario_9

SystemDynamics.WorldDynamics.World3

Combining the measures of Scenarios #6 and #8

Scenario_8

SystemDynamics.WorldDynamics.World3

More abundant non-recoverable natural resources, birth control, and stable industrial output

Scenario_7

SystemDynamics.WorldDynamics.World3

More abundant non-recoverable natural resources and birth control

Scenario_6

SystemDynamics.WorldDynamics.World3

More accessible non-recoverable natural resources, pollution control, land yield enhancement, erosion protection, and resource efficiency

Scenario_5

SystemDynamics.WorldDynamics.World3

More accessible non-recoverable natural resources, pollution control, land yield enhancement, and erosion protection

Scenario_4

SystemDynamics.WorldDynamics.World3

More accessible non-recoverable natural resources, pollution control, and land yield enhancement

Scenario_3

SystemDynamics.WorldDynamics.World3

More accessible non-recoverable natural resources and pollution control

Scenario_2

SystemDynamics.WorldDynamics.World3

More abundant non-recoverable natural resources

Scenario_1

SystemDynamics.WorldDynamics.World3

Original WORLD3 model