? Jones 2002 Jones C, 2002. A Century of Stock Market Liquidity and Trading Costs. Working Paper. Columbia University, New York, NY. loulin 2008 Joulin A, Lefevre A, Grunberg D, Bouchaud JP, 2008. Stock price jumps: news and volume 286 EFTA00625414 Kaldor 1956 Keen 1995 Keen 2004 Keynes 1936 Ke