This dissertation studies internal and external factors affecting firm outcomes. The first two chapters explore the sources of variation in managerial skill within an Indian life insurance firm. The existing literature has investigated the association between managerial productivity and management practices across firms, but has largely overlooked how individual traits and skills affect managerial performance. Intra-firm variation in managerial productivity allows us to study managerial skill without the confounded effects of variation in management practices. The third chapter models how external technological change affects competition between media firms, and what that implies for information availability in a society. For the first t...