This newly available data source makes it possible to examine some of the key questions asked above related to immigration policies and the skills of migrants which have not been fully addressed until now because of data limitations. Most importantly, this survey allows drawing comparisons across countries which differ in terms of immigration and integration policies, migration history and labour market conditions. The chapter addresses some important questions and raises others that could open new domains of research to guide policy. Section 8.2 provides a description of the Survey of Adult Skills and presents the basic characteristics of migrants.