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136<br />

<strong>in</strong>cludes order book variables, but excludes dynamics, outperforms a dynamic<br />

specification without covariates. This result clearly <strong>in</strong>dicates that traders’ order<br />

aggressiveness and order submission strategy is affected by the state <strong>of</strong> the book.<br />

Regard<strong>in</strong>g the impact <strong>of</strong> order book variables on order aggressiveness, our<br />

results broadly confirm the theoretical results on traders’ optimal order submission<br />

strategies as derived by Parlour (1998) and Foucault (1999). In particular, the<br />

impact <strong>of</strong> depth on order aggressiveness can be expla<strong>in</strong>ed by “crowd<strong>in</strong>g out”<br />

effects as discussed <strong>in</strong> Parlour (1998). Moreover, our f<strong>in</strong>d<strong>in</strong>gs provide evidence for<br />

the notion that traders use the order book <strong>in</strong>formation to <strong>in</strong>fer expected future price<br />

movements. Nevertheless, we also observe behavior that is not consistent with<br />

predictions implied by theoretical dynamic equilibrium models. For <strong>in</strong>stance, we<br />

f<strong>in</strong>d evidence for liquidity driven order submissions after mid-quote changes <strong>in</strong> the<br />

<strong>recent</strong> past. Furthermore, no support is found for the hypothesis that the current<br />

volatility affects the mix between aggressive market and limit orders. Rather, we<br />

observe that a rise <strong>in</strong> volatility <strong>in</strong>creases the overall order submission activity <strong>in</strong> the<br />

market.<br />

The rema<strong>in</strong>der <strong>of</strong> the paper is organized <strong>in</strong> the follow<strong>in</strong>g way: In Sect. 2, we<br />

discuss economic hypotheses on the basis <strong>of</strong> <strong>recent</strong> theoretical research on limit<br />

order book trad<strong>in</strong>g. Section 3 presents the econometric approach. In Sect. 4, we<br />

describe the data as well as descriptive statistics characteriz<strong>in</strong>g the limit order<br />

books <strong>of</strong> the <strong>in</strong>dividual stocks traded at the ASX. The empirical results are reported<br />

and discussed <strong>in</strong> Sect. 5 and Sect. 6 concludes.<br />

2 Economic hypotheses<br />

A. D. Hall, N. Hautsch<br />

The desire for a deeper understand<strong>in</strong>g <strong>of</strong> market participants’ order submission<br />

strategies <strong>in</strong> a limit order book market has <strong>in</strong>spired a wide range <strong>of</strong> theoretical and<br />

empirical research. 4 In a limit order book market <strong>in</strong>vestors must choose between<br />

limit orders and market orders and as a result traders face a dilemma. The advantage<br />

<strong>of</strong> a market order is that it is executed immediately. However, with a limit<br />

order, while traders have the possibility <strong>of</strong> improv<strong>in</strong>g their execution price, they<br />

face the risk <strong>of</strong> non-execution as well as the risk <strong>of</strong> be<strong>in</strong>g “picked <strong>of</strong>f”. The latter<br />

arises from the possibility that, as a result <strong>of</strong> new <strong>in</strong>formation enter<strong>in</strong>g the market, a<br />

limit order can become mispriced. These economic pr<strong>in</strong>ciples form the basis <strong>of</strong><br />

numerous theoretical approaches <strong>in</strong> this area.<br />

Parlour (1998) proposes a dynamic equilibrium model <strong>in</strong> which traders with<br />

different valuations for an asset arrive randomly <strong>in</strong> the market. The endogenous<br />

execution probability <strong>of</strong> a limit order then depends both on the state <strong>of</strong> the book and<br />

how many market orders will arrive over the rema<strong>in</strong>der <strong>of</strong> the day. She shows that<br />

both the past, through the state <strong>of</strong> the book, and the future, through the expected<br />

order flow, affect the placement strategy and cause systematic patterns <strong>in</strong><br />

transaction and order data. The major underly<strong>in</strong>g idea is the mechanism <strong>of</strong> a<br />

“crowd<strong>in</strong>g out” <strong>of</strong> market sell (buy) orders after observ<strong>in</strong>g market buy (sell) orders.<br />

This is due to the effect that after a buy (sell) market order, a limit order at the ask<br />

4 See e.g. Glosten (1994), Handa and Schwartz (1996), Harris and Hasbrouck (1996), Seppi<br />

(1997), Harris (1998), Bisière and Kamionka (2000), Griffiths et al. (2000), Lo and Sapp (2003),<br />

Cao et al. (2003), or Ranaldo (2004) among others.

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