This is a special issue of QMRIJ whichreflects important aspects of research andbusiness. This special issue has been guestedited from IBM by Professor Merlin Stoneand Julie Abbott. Far reaching advances incommunications and information technologymean that interaction between companies andtheir...

This paper estimates demand for Internet portals using a clickstream data panel of 2654 users. It shows that familiar econometric methodologies used to study grocery store scanner data can be applied to analyze advertising-supported Internet markets using clickstream data. In particular, it...