However, they claim that "the fewer possibilities of employment and the greater informality recorded in the I Tarapacá Region in relation to the rest of the country because 2000, coincide with the greater presence of foreigners in its territory, although a cause-effect relation between the two phenomena has not been established" Vergara and Rodríguez, 2005, p.
Sin embargo, afirma que "Las menores posibilidades de empleo y la mayor informalidad que registra la Primera región en relación con el resto de país, desde el 2000, coinciden con la mayor presencia de extranjeros en su territorio, aunque no se ha establecido una relación de causa y efecto entre ambos fenómenos" Vergara y Rodríguez, 2005, p. 26.