Table 4.

Variables of student mobility data.

Variable	Description
from_hei	The institution of origin of the student.
to_hei	The destination of the mobility.
age	The age of the student in years.
gender	The gender of the student.
nationality	The nationality of the student.
subject	The subject area of the mobility.
subject1	The main subject area of the mobility.
level	The level of study in the institution of origin.
yearprior	Number of completed years of HE study prior to the period abroad.
duration	The duration of study abroad in months.
credit	The number of credits obtained whilst studying abroad.
language	The language of study.
languageprep	The type of linguistic preparation.
sevsupp	The total value of the grant awarded for a disability over a study period. Currency in Euros.
grant	The overall subsistence expenses excluding additional funding for disabilities. Currency in Euros.
previous	This field indicates whether the student has received an Erasmus grant prior to the present one.
qualification	This field holds information on whether the student will graduate with a double or joint degree, or any other qualification at the Host Institution.
year	The academic year whilst studying abroad.
distance	The geodesic distance between the home and host cities in km, calculated based on the geocodes of the cities.
direction	The geodesic direction from the starting point to the endpoint in degrees, which was calculated based on the geocodes of the cities.