"There's absolutely no evidence that more and more micro-enterprises will somehow lead through some unspecified mechanism to economic development and poverty reduction, " he adds.
One difficulty was finding a mechanism that would lead to the immediate lifting of a tribunal's injunction that had prevented BP and Rosneft from swapping shares.
Toyota previously issued recalls on two specific problems it acknowledged, a mechanism that might lead to a sticky gas pedal and floor mats that might interfere with its action.