Context:

• Recently ADB’s report titled ‘Asian Economic Integration Report 2018 revealed that most of the international migrants in 2017 were from India, followed by China and Bangladesh.
• The report says that about one in three international migrants is from Asia led by India and the PRC (People’s Republic of China).
• Asia continued as the largest source of international migrants globally although the number of Asian migrants headed to regional destinations declined slightly.
• The global stock of international migrants from Asia rose 3.9 per cent from 83.6 million in 2015 to 86.9 million in 2017.
• The report also said intraregional migrants to India largely come from neighbouring countries such as Bangladesh (3.1 million), Pakistan (1.1 million) and Nepal (0.5 million).

Recommendations on statistics:

• The United Nations recommendations on statistics of international migration define the ‘stock of international migrants present in a country’ as 
  ‘the set of persons who have ever changed their country of usual residence, that is to say, persons who have spent at least one year of their lives in a country other than the one in which they live at the time the data are gathered.:
• International migrant stock consists of persons crossing borders for various reasons, for example, employment, family reunification, study, and fleeing from conflicts and violence.

Source:PIB