Hi

could you please go through to the model. how would you use gravity model to study migration?

you can study this with other model

Mojtaba Shahbazi The gravity model of migration is a model in urban geography derived from Newton's law of gravity, and used to predict the degree of migration interaction between two places. Newton's law states that: "Any two bodies attract one another with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them."

When used geographically, the words 'bodies' and 'masses' are replaced by 'locations' and 'importance' respectively, where importance can be measured in terms of population numbers, gross domestic product, or other appropriate variables. The gravity model of migration is therefore based upon the idea that as the importance of one or both of the location increases, there will also be an increase in movement between them. The farther apart the two locations are, however, the movement between them will be less. This phenomenon is known as distance decay.

The gravity model can also be used to determine the sphere of influence of each central place by estimating where the breaking point between the two settlements will be. An example of this is the point at which customers find it preferable, because of distance, time and expense considerations, to travel to one center rather than the other.

The gravity model can be used to measure accessibility to services (e.x., access to health care).

Hadi Jabbar Alagealy Thank you very much, can you suggest examples of such models?

that is really interesting. I didnt think that Newton gravity law can be applied in social scinece.

Mojtaba Shahbazi Yes, there are many uses for this model, especially in the economic field...in international trade...migration...tourist flows. We take inspiration from physics to make our research more accurate.