URN:NBN:SI:doc-D6UDKI6B2009Leigh, William E.Purvis, Russelldocuments/doc/D/URN_NBN_SI_doc-D6UDKI6B_001.pdfdocuments/doc/D/URN_NBN_SI_doc-D6UDKI6B_001.txt232articlestr. 191-1950350-559622835239URN:NBN:SI:doc-D6UDKI6BengSlovensko društvo InformatikaInformatica (Ljubljana)InCborzeefficiencyinformacijska tehnologijainformation technologyučinkovitostHistorical impulse response of return analysis shows information technology improves stock market efficiency