The paper investigates regional labor market dynamics in Europe and co
mpares the results to those obtained for the US. It analyzes to what e
xtent regional employment dynamics are common to all regions in Europe
and to all states in the US. It finds that a larger proportion of mov
ements in employment growth is common to all US states than to all EEC
regions. Next, the paper studies the adjustment mechanisms that a typ
ical region-specific shock triggers. It shows that for Europe, in the
first three years, most of the shock is absorbed by changes in the par
ticipation rate while, in the US, it is immediately reflected in migra
tion. Surprisingly, in both cases, the unemployment rate plays a small
role suggesting the presence of natural unemployment rates at the reg
ional level.