System Dynamics Applications / 4 / 4.1 / 4.1.8

4.1.8 Dynamic Hypotheses—Migrating-In

Textual Description. Part of the annual growth in population is due to migrants choosing to live in Charmville.

Module Influence Diagram. The influence diagram for the Migrating-in module is shown in Figure 4-5.

Module Stock-and-Flow Diagram. The stock-and-flow diagram for Migrating-in is shown in Figure 4-6.

Assumptions. The following assumptions apply to this module and to the model overall:

• Policy regarding migration to Charmville is created by local government authorities.
• Migrating-in is effectively controlled by availability of housing.
• There are no age-group distinctions made in this model.

Specific Exclusions From This Module. The following are specifically excluded from this module:

• Considerations of ages of immigrants.
• Considerations of the size of population on migrating-in. Consequently, there is no need for an information link from POPULATION to Migrating-in.
• Refugee or illegal immigrant arrivals.

Specific Inclusions in this Module. The following are specifically included in this module:

• Initial size of population.