Would you expect twins to reach different heights? The comparison is perhaps not so accurate, but in the early 1950s Abruzzo and Sicily were economically very similar. Both were 'full members' of the underdeveloped Mezzogiorno, with little industry, few natural resources, poor transport...

There are various paths through which globalization is channelled to the labour market. One of these is the effect on labour demand elasticity. Trade might induce an increase in this elasticity via a scale effect due to the increased competition on the output market and/or via a substitution...