Holzmann, Robert; Werding, Martin - In: CESifo economic studies : CESifo, a joint initiative of … 61 (2015) 2, pp. 335-345
The stock of migrants living outside their countries of origin may appear small, amounting to some 3% of the world population (United Nations Population Fund 2014). But this represents more than 200 million people, and this share has been (re-)increasing since the 1970s. The underlying flows are...