This paper summarizes the results of a study examining marketing mix decisions for industrial products. The study involved 131 products from 22 companies. Models are presented for determining advertising expenditures, total marketing expenditures, how to allocate marketing budgets, factors that influence year-to-year changes in advertising spending, and selection of distribution channels. The key findings are that marketing expenditures and the split between advertising and personal selling depend mainly on a product's sales and number of customers. The decision to use a direct salesforce is influenced by company size, average order size, the product's life cycle stage, complexity, percentage of made-to-order sales, and purchase frequency.