I have noticed this in referral logs. They do it for tons of countries (I would guess all based on how many I see). Does Google automatically remerge all that

I have noticed this in referral logs. They do it for tons of countries (I would guess all based on how many I see). Does Google automatically remerge all that to treat it as one domain for pagerank (so links to those separate domains are just treated as if they linked to the .com page), duplicate content, etc.?