"Recent work on the fiscal impact of migration for all European OECD countries, as well as Australia, Canada and the United States, has provided new and internationally comparative evidence (Liebig and Mo, 2013). The study suggests the impact of the cumulative waves of migration that arrived over the past 50 years in OECD countries is on average close to zero, rarely exceeding 0.5% of GDP in either positive or negative terms. The impact is highest in Switzerland and Luxembourg, where immigrants provide an estimated net benefit of about 2% of GDP to the public purse."
