"…A pessimistic view is that a large share of the unemployment we are seeing, particularly the longer-term unemployment, is structural in nature, reflecting factors such as inadequate skills or mismatches between the types of skills that workers have and the skills that employers demand…".

Ecco il testo in inglese dell'intero discorso: http://www.federalreserve.gov/newsevents/speech/bernanke20120326a.htm.