Migrant Labour and the Reshaping of Employment Law - Paperbackby Bernard Ryan (Editor), Rebecca Zahn (Editor) The presence of migrant workers has become a central feature of labour markets in highly developed countries. The International Labour Organisation estimates that in 2013 there were 112 million resident migrant workers in the 58 highest income countries, who made up 16% of the workforce. Non resident workers have also increasingly become part of the labour available for employment in other states, often