What is the role of migration?

In terms of demography, migration - the same fundamental mechanism, as well as the reproduction of the population.Through migration can significantly change the population, its age and ethnic composition.All of this has an impact on the demographic balance of territorial units of different levels - from a small village to the whole continent.Therefore, in most countries, migration is subject to strict control.Control migration allows the society certain demographic box, from which you can benefit to the general population.

The demographic development, migration can play three roles: to reduce the population at a negative balance or increase it with a positive balance.Factors in which the outflow o
f population from the country accompanied by the influx of migrants into the country, saying that the migration performs a compensatory function.And not always quantify the compensation is quality: the country can diminish valuable for the development of human resources of society, and to come - cheap labor.

Types and legal migration

migratory movements are divided into internal (within the territorial object) and external (between different territorial entities).At a residence time of migration can be temporary and long-term.Classifications migration, there are quite a few, but the most popular - a classification reasons.The reasons may be as follows:

- economic (including labor migration);
- cultural;
- political;
- social;
- military.

Migration, like any other demographic process, carried out by logical laws.For example, large cities and developed countries are more attractive to migrants than smaller ones.In addition, statistics show that the largest cities are growing more by migration than by natural increase of the population.Economic development - a crucial factor in determining the volume of migration: the greater development of trade and production, the more migrants arrive in the country.A particularly important aspect is the development of transport.

distances between objects for migrants are of great importance.Thus, the largest number of migrations made between close localities.One of the important laws determining the demographic development of countries and cities is the law kontrpotoka: for every flow of migrants into the spatial object exists flow directed in the opposite direction.To determine the qualitative composition of these flows, we can determine the socio-economic situation in the country.