Automated processes are disclosed for identifying bundles of three or more items to suggest to users. In one embodiment, item action data, such as item purchase data reflective of the item purchases of a user population, is used to detect pairwise (item to item) associations between particular items represented in an electronic catalog. These pairwise associations are then used (optionally in combination with other information) to select bundles of three or more items to recommend to users. The bundles may, for example, be suggested on item detail pages of the electronic catalog.