Besides, he learned the hard way more than a decade ago that intervention in the foreign-exchange markets is generally a fruitless exercise.

ECONOMIST: Bruised, battered and broke

One is seen as a single, modest intervention, while the other is a continuing exercise of significant control over individual conduct.

FORBES: Litigation, Regulation, Antitrust: Bad Bets For An Innovation Economy

He said while it was important to "exercise a degree of restraint" with state intervention, there were cases where the state must intervene.

BBC: child