TABLE 2.

Independent Variables Used in Analysis of Undocumented Migration and Return from Four Latin American Countries

Variable	Definition
Demographic background
Age	Years since birth
Married	Currently married in person-year
Number children 0–1	Number of children age 0–1 in household during person-year
Number children 2–5	Number of children age 2–5 in household during person-year
Socioeconomic background
Years of schooling	Years of schooling completed in person-year
Occupation
Not working	Not employed in person-year
Unskilled	Agricultural workers, operatives, clerks, waiters, restaurant attendants, and other unskilled workers
Skilled	Technicians, professionals, artists, managers, supervisors, equipment operators in manufacturing, sales, clerical, and other administrative workers
Owns real estate	Owned house or land in person-year
Owns business	Owned business enterprise in person-year
Social capital
Parent ever U.S. migrant	Parent had been to U.S. by person-year
Sibling ever U.S. migrant	Sibling had been to U.S. by person-year
Child ever U.S. migrant	Child had been to U.S. by person-year
Migratory prevalence	Percentage of those aged 15+ with U.S. experience in person-year
Migration-specific capital
Entered on tourist visa	Entered U.S. with a tourist visa
Duration of trip	Months spent in U.S. on latest trip
Contextual factors
Community population (× 1,000)	Number of inhabitants in person-year
Linewatch hours (× 1,000,000)	Hours spent by U.S. Border Patrol patrolling border
Deportations (× 10,000)	Number of deportations from interior of U.S.
Access to documents (per 100)	Legal U.S. visas (temporary and permanent) per capita
Relative GDP per capita	Ratio of GDP in U.S. relative to Mexico