When markets fail to allocate resources efficiently, the ultimate source of the problem is usually

Cadillac's portfolio consists of sedans, a crossover, a sport utility vehicle, and a high-performance version of the sedan. the sedans are sold through the cadillac dealer network, but the high-performance version is sold in limited volumes and is not available at all dealers. this difference in availability is an example of how the products within the cadillac portfolio are differentiated by the