Cuenca's City Hall made a paper on those 2 specific groups: Europeans and NorthAmericans and their "impact" in the local society.
Only Spanish, sorry.
Maybe Google translate can help you on this or a fluent Spanish speaking person.
ALCALDÍA PRESENTÓ ESTUDIO SOBRE LOS IMPACTOS SOCIO ECONÓMICOS DE LA MIGRACIÓN EN CUENCA.
Link to the paper (free download)
Scroll down the page and click on "Archivos Adjuntos"
Enjoy.
You're welcome!