The inter-relations between the components are described in the graphic above. The graphic is not the model, it is a representation of the model. A graphic representation of the interconnections of the components is much easier to grasp than a textual representation. That being said, please note that the text devoted to description of the component does describe the interconnections. The model is the entirety of this research web site, both graphics and text.
Migration is a household affair.
Every member affects the process, if not actively, then certainly as a passive factor. Even when the migration will temporarily break up the household, the decision is made by the family unit. The migration process is usually quiescent, only infrequently are actions taken to gather information, make decisions or make preparations for migration. Life must go on. Indeed, maintenance of the economic well-being and emotional stability of the household actively discourages migration, a very disruptive process.