He credited another (future) Nobel Prize winner, James Meade, for having recognized the importance of labor mobility in earlier work, but criticized Meade for interpreting the idea too stringently, especially in the context of Europe’s nascent integration.
Mundell ne s’est pas spécialement intéressé aux crises financières, mais il semble assez évident que la mobilité du travail est plus importante aujourd’hui que jamais.