that's because they don't mixed with another
cities... if you make ask everyone in town
all of them are related in certain way...
if you want to see how really ticas are..
take a look on the old pics at the national theater or in Multiplaza del Este close to the POPS there is another set of pics how really ticas are... (east side of SJ + Cartago)
as white as an onion...
i agree with alex on the statement of the nicaraguan influence.. that's on the north side of the country,,, but also the native costa ricans, where concentrated most of them in the south,,,
by history ticos are: the colonials, the chineese Ones, and the black dudes, and the native ones from the south...
the rest are nicas...