Abstract: Using a general-purpose computer, the system allocates, tracks, and forecasts market data by product, geographic area, market segment, provider, and time period, in a way consistent with accepted regional market sizes. Inputs include regional market data, demographic, psychographic, and/or firmagraphic data, weighting coefficients, profiles, and ratings. The system allocates regional markets to subregions as defined by an area hierarchy. Allocation fractions are computed as ratios of subregional to regional rated buying populations. A subregional rated buying population is a weighted sum of rated buying populations for a set of market factors such as age or household income. A rated buying population for a particular market factor is the sum of rated buying populations for a set of categories such as age or income brackets. A rated buying population for a particular category is the product of the subregional population falling within that category and a propensity-to-buy rating for that category.