On the topic of the economics of accepting refugees vs. not accepting them, there was a radio piece on CBC a couple of months ago.
"Economist Don DeVoretz of Simon Fraser University has studied the economic experiences of refugees in Canada, and thinks it makes economic sense, in the long run, to accept more refugees. -
http://www.cbc.ca/player/play/2674997351 "
It's 9 mins long, but if you don't feel like listening to it, he states that there is no strong economic benefit to accepting refugees, nor is there a strong economic argument against accepting refugees. (Essentially, the cost is paid off by the tax the refugee will pay in later years) However, when those refugees who stay, have children, those children become workers and taxpayers as adults and the country benefits in the end.