Ms Groshen and Mr Potter believe the ups and downs of the cycle are coinciding with deeper shifts in the structure of the economy.

ECONOMIST: The not-quite-so-jobless recovery

Many of the concerns that were identified, though, require a deeper understanding of the structure and operation of these funds in order to properly evaluate them.

FORBES: Private Equity, Hedge Funds Must be Understood to be Regulated Effectively

Bringsjord said he and his graduate students could potentially focus on providing Watson with a deeper understanding of the structure of sentences and how dialogues unfold.

WSJ: IBM sends Watson to NY college to boost its skills

It does not have a modular structure and emphasises "digging deeper" into a subject - with exams at the end of two years of study.

BBC: Qualifications glossary

It does not have a modular structure and emphasises the virtues of "digging deeper" into a subject - with exams at the end of two years of study.

BBC: A-level alternative gets approval