WOLFRAM SYSTEM MODELER
Service_Sector_InvestmentInvestments in the service sector |
 |
Diagram
Wolfram Language
In[1]:=
SystemModel["SystemDynamics.WorldDynamics.World3.Service_Sector_Investment"]
Out[1]:=
Information
This model calculates the capital invested in the service sector.
Whereas the earlier WORLD2 model lumped all capital investment into a single state variable from which it then split off the percentage of capital invested in the agricultural sector as a second state variable (a funny choice for a state variable, since percentages don't accumulate), the more modern WORLD3 model differentiates between capital invested in industry, capital invested in the service sector, capital invested in agriculture, and other capital investment.
The service capital is measured in U.S. dollars.
Parameters (6)
| t_policy_year |
Value: 4000 Type: Real (yr) Description: Year of policy change |
|---|---|
| p_avg_life_serv_cap_1 |
Value: 20 Type: Real (yr) Description: Default average life of service sector capital |
| p_avg_life_serv_cap_2 |
Value: 20 Type: Real (yr) Description: Controlled average life of service sector capital |
| p_serv_cap_out_ratio_1 |
Value: 1.0 Type: Real (yr) Description: Default fraction of service sector output ratio |
| p_serv_cap_out_ratio_2 |
Value: 1.0 Type: Real (yr) Description: Controlled fraction of service sector output ratio |
| service_capital_init |
Value: 144000000000.0 Type: Real (dollar) Description: Initial service sector investment |
Connectors (7)
 |
population |
Type: MassInPort Description: Population |
|---|---|---|
|
capital_util_fr |
Type: MassInPort Description: Capital utilization fraction |
|
industrial_output |
Type: MassInPort Description: Annual industrial output |
|
ind_out_pc |
Type: MassInPort Description: Per capita annual industrial output |
 |
serv_out_pc |
Type: MassOutPort Description: Per capita annual expenditure in services |
|
service_capital |
Type: MassOutPort Description: Total capital invested in service sector |
|
s_fioa_serv |
Type: MassOutPort Description: Fraction of total investments allocated to the service sector |
Components (18)
 |
Source1 |
Type: Source Description: This is the (dummy) source model of System Dynamics |
|---|---|---|
 |
Serv_Cap_Invest |
Type: RRate Description: p.230 of Dynamics of Growth in a Finite World |
 |
Service_Capital |
Type: Level Description: p.230 of Dynamics of Growth in a Finite World |
|
Serv_Cap_Deprec |
Type: RRate Description: p.231 of Dynamics of Growth in a Finite World |
 |
Sink1 |
Type: Sink Description: This is the (dummy) sink model of System Dynamics |
 |
Serv_Cap_Inv |
Type: Prod_2 Description: p.230 of Dynamics of Growth in a Finite World |
 |
Serv_Cap_Dep |
Type: Division Description: p.231 of Dynamics of Growth in a Finite World |
 |
S_Avg_Life_Serv_Cap |
Type: S_Avg_Life_Serv_Cap Description: p.231 of Dynamics of Growth in a Finite World |
 |
Service_Output |
Type: Service_Output Description: p.231 of Dynamics of Growth in a Finite World |
 |
S_Serv_Cap_Out_Ratio |
Type: S_Serv_Cap_Out_Ratio Description: p.232 of Dynamics of Growth in a Finite World |
 |
S_FIOA_Serv |
Type: S_FIOA_Serv Description: p.229 of Dynamics of Growth in a Finite World |
 |
P_Fr_IO_Al_Serv_1 |
Type: Tabular Description: p.229 of Dynamics of Growth in a Finite World |
|
P_Fr_IO_Al_Serv_2 |
Type: Tabular Description: p.229 of Dynamics of Growth in a Finite World |
|
Div1 |
Type: Division Description: p.229 of Dynamics of Growth in a Finite World |
 |
S_Indic_Serv_PC |
Type: S_Indic_Serv_PC Description: p.227 of Dynamics of Growth in a Finite World |
|
P_Indic_Serv_PC_1 |
Type: Tabular Description: p.227 of Dynamics of Growth in a Finite World |
|
P_Indic_Serv_PC_2 |
Type: Tabular Description: p.227 of Dynamics of Growth in a Finite World |
|
Serv_Out_PC |
Type: Division Description: p.232 of Dynamics of Growth in a Finite World |
Used in Examples (11)
 |
SystemDynamics.WorldDynamics.World3 Original WORLD3 model |
 |
SystemDynamics.WorldDynamics.World3 More abundant non-recoverable natural resources |
 |
SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources and pollution control |
 |
SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources, pollution control, and land yield enhancement |
 |
SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources, pollution control, land yield enhancement, and erosion protection |
 |
SystemDynamics.WorldDynamics.World3 More accessible non-recoverable natural resources, pollution control, land yield enhancement, erosion protection, and resource efficiency |
 |
SystemDynamics.WorldDynamics.World3 More abundant non-recoverable natural resources and birth control |
 |
SystemDynamics.WorldDynamics.World3 More abundant non-recoverable natural resources, birth control, and stable industrial output |
 |
SystemDynamics.WorldDynamics.World3 Combining the measures of Scenarios #6 and #8 |
 |
SystemDynamics.WorldDynamics.World3 Influencing the future 20 years earlier |
 |
SystemDynamics.WorldDynamics.World3 Influencing the future 10 years later |