When homogeneous or closely-linked securities trade in multiple markets, it is often of interest to determine where price discovery (the incorporation of new information) occurs. This article suggests an econometric approach based on an implicit unobservable efficient price common to all markets. The information share associated with a particular market is defined as the proportional contribution of that market's innovations to the innovation in the common efficient price. Applied to quotes for the thirty Dow stocks, the technique suggests that the preponderance of the price discovery takes place at the New York Stock Exchange (a median 92.7 percent information share).

[This article investigates the behavior of intraday trades and quotes for individual stocks on the Tokyo Stock Exchange (TSE). We examine the transaction and quote record for three firms for the first 3 months of 1990. Our findings suggest that the immediacy available (at least for small trades) in the market is high, despite the reliance on public limit orders to supply liquidity. When orders that would otherwise walk through the limit order book are converted into limit orders, execution is delayed, but some orders execute (at least in part) at more favourable prices.]

When homogeneous or closely-linked securities trade in multiple markets, it is often of interest to determine where price discovery (the incorporation of new information) occurs. This article suggests an econometric approach based on an implicit unobservable efficient price common to all markets. The information share associated with a particular market is defined as the proportional contribution of that market's innovations to the innovation in the common efficient price. Applied to quotes for the thirty Dow stocks, the technique suggests that the preponderance of the price discovery takes place at the New York Stock Exchange (NYSE) (a median 92.7 percent information share).

When homogeneous or closely‐linked securities trade in multiple markets, it is often of interest to determine where price discovery (the incorporation of new information) occurs. This article suggests an econometric approach based on an implicit unobservable efficient price common to all markets. The information share associated with a particular market is defined as the proportional contribution of that market's innovations to the innovation in the common efficient price. Applied to quotes for the thirty Dow stocks, the technique suggests that the preponderance of the price discovery takes place at the New York Stock Exchange (NYSE) (a median 92.7 percent information share).

Yasushi HamaoColumbia UniversityJoel HasbrouckNew York UniversityThis article investigates the behavior of intra-day trades and quotes for individual stocks onthe Tokyo Stock Exchange (TSE). We examine thetransaction and quote record for three firms forthe first 3 months of 1990. Our findings suggestthat the immediacy available (at least for smalltrades) in the market is high, despite the re-liance on public limit orders to supply liquidity.When orders that would otherwise walk throughthe limit order book are converted into limit or-ders, execution is delayed; but some orders exe-cute (at least in part) at more favorable prices.