Seeing a side discussion about Australian vs. UK immigration system, I grew curious as to how popular are different models of immigration systems around the world.

I'm looking for a good compiled data on how popular specific features are among the countries, including the following typical categories:

  • Limited vs. Unlimited (e.g. is the # of immigrants capped; and how large is it compared to present population)

  • Degree of selectivity (e.g. are people with needed skills prioritized generally or exclusively) (this one is harder to score/evaluate since for example USA has a hybrid system where some spots are reserved for skills based visas and some for no-requirements-based visas)

  • 1
    I don't know that the US has any "no requirements" immigration. The US is noteworthy for accepting family reunification as an uncommonly large fraction of its overall immigration. But "related to a citizen" is, in and of itself, a requirement.
    – Brythan
    Mar 21 '17 at 16:06
  • @Brythan - Yeah, as I said, US has a hybrid and some fractions match all different patterns.
    – user4012
    Mar 21 '17 at 16:12
  • 1
    @Brythan what about the green card lottery?
    – phoog
    Mar 22 '17 at 3:07

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