The growth rate of total factor productivity seems to have increased recently, at least in the United States. Higher US productivity growth may justify higher stock market valuations than in the past and thus herald an emerging New Economy. However, the size of the estimated growth rate of total...

This note clarifies the relation between two competing definitions of the contribution to pricediscovery in market microstructure models: (i) the information share and (ii) the common factorcomponent weight. It is demonstrated that the two measures are closely related, but that only...