Andras,

No one who thinks about it would doubt that migrants create jobs as well as taking them, but it doesn't necessarily follow that they create more jobs than they take.

http://insidestory.org.au/australia-today-a-million-new-adults-just-385000-new-jobs

Youth unemployment is particularly high. Why would a 7-11 franchisee hire a young Australian, who has rights and would have to be paid award wages, when he can hire a desperate international student who is prepared to hand back half his wages, away from the security cameras of course?

Our whole immigration system is riddled with corruption from top to bottom. I am no more prepared to believe your experts than you are to believe Prof George Borjas or Prof Bob Birrell. See

http://www.smh.com.au/national/corruption-and-crime-syndicates-threaten-australias-border-security-20160622-gpp72z.html

It is yet to be seen how the events in the Middle East will transform the German real estate market, but there are a few points upon which experts agree:
1)The huge influx of migrants generates additional demand on the affordable rental housing market that was already under pressure and in short supply.
2)Construction volumes have to increase to accommodate the enormous number of expected migrants.
3)The government will likely ease construction standards and introduce additional measures encouraging private investors.
4)Refugee accommodation subsidies may continue for years as the government figures out how to integrate new arrivals onto the job market.