The source of this failure is often a one-sided focus on economic models of migration,
which claim that migration is an individual response to market factors.
This led to the belief that migration can be turned on and off like a tap, by changing policy settings which influence the costs and benefits of mobility for migrants.
But migration may continue due to social factors, even when the economic factors which initiated the movement have been completely transformed.
• However, migration is motivated by the imperative of fight from violence, and by the hope of building a better life elsewhere.
The concept of the ethnic minorities always implies some agree of marginalization or exclusion, leading to situations of actual of potential conflict.