He added that this was the opposite of the 2001 credit-tightening cycle, when the credit conditions for smaller businesses recovered more quickly.

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Doctors had also noticed that patients helped to relax before an operation recovered more quickly, often being kept in hospital one or two fewer days.

BBC: Stress slows healing

Shahzad made an impressive Test debut when he took four wickets in England's innings win over Bangladesh at Old Trafford earlier this month, but he was originally denied a place in the one-day squad when fellow Yorkshire all-rounder Tim Bresnan recovered more quickly than anticipated from a foot problem.

BBC: Ajmal Shahzad called into England one-day squad

But momentum was quickly recovered, with more than 1500 people trying to crowd into the tent on the last day.

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And Arizona recovered from the recession of the early 1990s more quickly than its neighbours.

ECONOMIST: Urban sprawl