Primary immigration is a term which describes the movement of the earner of a family

Family

In human context, a family is a group of people affiliated by consanguinity, affinity, or co-residence. In most societies it is the principal institution for the socialization of children...

, or a young unattached single

Single (relationship)

In legal definitions for interpersonal status, a single person is someone who is not in a relationship or is "unmarried". If a marriage is annulled, however, or it is found to have been void ab initio , and assuming the person was not married previously, that individual is single, rather than...

 man

Man

The term man is used for an adult human male . However, man is sometimes used to refer to humanity as a whole...

, from one country

Country

A country is a region legally identified as a distinct entity in political geography. A country may be an independent sovereign state or one that is occupied by another state, as a non-sovereign or formerly sovereign political division, or a geographic region associated with a previously...

 to another, usually to improve their economic condition. Once the primary immigrant is established in the new country, they will often send for their family to come and join them (perhaps many years later), according to family reunification

Family reunification

Family reunification is a recognized reason for immigration in many countries. The presence of one or more family members in a certain country, therefore, enables the rest of the family to immigrate to that country as well....

immigration laws. This is known as secondary immigration. Most countries tend to restrict the categories of people allowed to be primary immigrants, but allow the reunification of families of people already legally resident.