Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Les r\'eservations et les suspensions de cotation sont-elles un frein
  \`a l'efficience informationnelle des march\'es ?   The use of the trading halts is a practice common to all markets. However,
the advantages and the disadvantages of the measurements are regularly
discussed. The partisans think that the trading suspensions or the price limits
make it possible to the investors to have time to react to the new information.
The detractors think that the trading halts are barriers with the trade. A
theorical debate thus continued with an empirical discussion. The results of
this study appear relatively scattered. It is today difficult to draw a general
conclusion as for the effectiveness of the trading halts.

15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th