Immigration policy

An immigration policy is any policy of a state that affects the transit of persons across its borders, but especially those that intend to work and to remain in the country. It is often closely related to other policies:

Tax, tariff and trade rules that determine what goods they may bring with them, what services they may perform while temporarily in the country, and etc.and who is allowed to remain, e.g. the European Union has no immigration restrictions within it, any resident of any of the signatory nations may move and seek work anywhere within.
investment policy that permits wealthy immigrants to invest in businesses in exchange for favorable treatment, early issuance of passports and permanent resident status.
agricultural policy that may make exemptions for migrant farm workers, who typically enter a country only for the harvest season and then return home to a developing nation (such as Mexico or Jamaica which often send such workers to US and Canada respectively).

An important aspect of immigration policy is the treatment of refugees, more or less helpless or stateless people who throw themselves on the mercy of the state they enter, seeking refuge from some poor treatment in their country of origin.

With the rise of terrorism worldwide, another major concern is the national security of nations that let masses of people across their borders. These concerns often lead to intrusive security searches and tighter visa requirements, which discourage all forms of immigration, and even discourage temporary visitors to a great degree.

There is often pressure on nations to loosen immigration policy or inspections to enable tourism and relocation of businesses to a country, from a destabilized region.