Ompare and contrast immigration policies in the history of the following five countries: US, Canada, New Zealand, Australia and South Africa

Use at least 6 scholarly sources (non-internet) to compare and contrast the history of immigration policies of the US, Canada, New Zealand, Australia and South Africa (all of which are Britians former colonies). The investigation of each countries policies should start after independence from Britian. This assignment is for a History of Economics class, writer should frequently use economic analysis to explain changes in policy and other general observations.