1. A computer implemented method of generating information on peoples' interest in different types of automobiles, the method comprising: monitoring, using a server, computer user navigation of a multiplicity of users to identify indications of interest in specific automobile models by such monitored users; producing, using the server, affinity data that indicate measures of respective paired associations between respective pairs of specific automobile models based upon at least a prescribed number of monitored users having indicated interest in the respective pairs of specific automobile models, wherein the affinity data includes a first measure of paired association of a first specific automobile model to a second specific automobile model and a second measure of paired association of the second specific automobile model to the first specific automobile model; monitoring, using the server, computer user searches of a multiplicity of users to identify categories of information of interest to the monitored users; correlating, using the server, categories of information with identified indications of interest in specific automobile models; obtaining, using the server, demographic information concerning the multiplicity of monitored users; correlating, using the server, demographic information with identified indications of interest in specific automobile models; receiving, using the server, a user request for market information about at least one automobile model identified by a user making the request; using the affinity data, by the server, to generate a measure of paired association between the at least one user identified automobile model and at least one other automobile model; using the correlated categories, by the server, to identify at least one category correlated with the at least one user identified automobile model; and using the correlated demographic information, by the server, to identify demographic information correlated with the at least one user identified automobile model.