GLMM - Gulf Labour Markets and MigrationMid-2013, estimates of Bahrain s population stood at 1,253,191 persons, of whom 638,361 (51 per cent) were foreign nationals. Most were from Asia (85 per cent) and especially from India (half of all foreign residents). Eighty per cent of expatriates are employed. They account for 77 per cent of the employed population and 81 per cent of the private sector s workforce. Asians are overwhelmingly involved in services and blue collar occupations, while Arabs more often fill managerial posts. Immigration flows to the Kingdom increased significantly over the 2000s, fuelled by high oil prices and the ensuing boom in the construction and services sectors. This demonstrates the difficulty to reconcile labour reforms, and especially, the Bahrainisation of the work force, with the maximisation of economic productivity.The GLMM programme is conducted by the Gulf Research Centre (GRC) and the Migration Policy Centre (MPC) and financed by the Open Society Foundations (OSF)