I consider a RUM model for migration where destination countries or regions are viewed as collections of ‘opportunities’ which are the fundamental units of choice for migrants. The best opportunity for a prospective migrant is more likely to be found in a destination that has many and...

This paper considers a random utility model (RUM) in which migrants view locations as aggregates of large numbers of alternatives from which they can freely choose. The best alternative is more likely to be found in a location where they are many and diverse. This predicted effect of size and...

I argue in this paper that the estimation of wage rigidity using country level data suffers from aggregation bias. Using European data for the years 2000-2017, I find that wages respond less flexibly to changes in unemployment at the regional level, compared to estimation using the same data...