This document discusses the economics of media ownership and structure. It introduces key concepts like capitalism, market failures, and media concentration. The dominant forms of media ownership have shifted from many small national owners to just a few large multinational conglomerates. This is due to the high-risk nature of media which favors consolidation. The US now dominates global media trade, controlling over half the market. There is debate around how much governments should regulate media markets to promote diversity and local content.