The second section discusses the recruitment process, and ways to assess the effectiveness of policies in terms of better outcomes in matching workers with jobs, as well as minimizing the cost of recruitment. The third section focuses on protection and outlines methods to assess how policies protect the wages and working conditions of migrant workers and deal complaints filed with government agencies. The fourth section reviews evidence on the impacts of migration on destination and origin countries, including on incomes, productivity, and non-economic factors such as crime and congestion. The fifth section points out the conceptual and practical difficulties in evaluating the various consequences of labour migration and lays out practical steps that national authorities can take to improve labour market testing, recruitment, labour market monitoring, and assessment of the overall impact. A final section reviews the experience of Malaysia in managing the admission and employment of foreign workers, and what light past research sheds on its impact on the Malaysian labour market and economy as a whole.