We analyse the trade characteristics and market conditions which determine the market share of an electronic order book at the London Stock Exchange, where an \upstairs" network of dual-capacity rms is also available for trade. We hypothesise and empirically verify that execution and information...

We study the impact on market liquidity of the introduction of a penalty for high order-to-trade ratios (OTRs), implemented by the Italian Stock Exchange to curtail high-frequency quote submission. We find that the fee is associated with a collapse in the quoted depth of the stocks that make up...

Does it matter to market quality if broker identities are revealed after a trade and only to the two traders involved? We find that implementing full anonymity dramatically improves liquidity and reduces trader execution costs. To explain this, we compare theories based on asymmetric information...