Upstream services liberalization improves the efficiency and cost of communication and energy services, reducing the marginal costs of downstream manufacturing firms through input-output linkages. This study explores one possible mechanism behind this finding: innovation. I investigate the effects of communication and energy services reform in India in the mid-1990s on downstream manufacturing firms’ decisions to invest in R&D. The empirical analysis uses manufacturing-firm level data and regulation indicators in the communications and energy service sectors. The liberalization of services in India had a positive effect on manufacturing-firm innovation. These results are concentrated on firms in the middle of the initial productivity distribution. The main channel is the elimination of entry barriers into the communication sector.