An Analyses of the Components of the Bid-ask Spreads in Shanghai Stock Market;

Effect of B shares opening to domestic investors on information asymmetry——Using bid-ask spread decomposition method;

In a quote-driven market,bid-ask spread is composed of order processing costs,stock holding costs and asymmetric information cost.

At present,the mode of fixing a price of books in our country is actually a kind of resale price maintenance(RPM),which is in favor of reaching harmony of publication,wholesale,retail,so that the three could make common efforts to boost book prices and seek monopoly profit.