We develop a new model of multi-product firms which invest to improve both the quality of their individual products and of their brand.  Because of flexible manufacturing, products closer to firms' core competence have lower costs, so they produce more of them, and also have higher incentives...

We develop a new model of multi-product firms which invest to improve both the quality of their individual products and of their brand. Because of flexible manufacturing, products closer to firms' core competence have lower costs, so they produce more of them, and also have higher incentives to...