Using country-level data, this paper investigates the determinants of productivity in emerging knowledge economies by estimating the spillovers associated with investment in Research & Development (R&D) and Information Technology (IT). The work illustrates that both forms of technicallyadvanced capital (R&D and IT) matter for long-run TFP growth. Furthermore, by inspecting knowledge spillovers associated with either the domestic production or import penetration of high-tech (IT) goods, we show that the R&D base of the domestic producers of IT assets is a fundamental driver of economic growth for the industrialized countries. In terms of TFP gains, a low degree of industry specialization in information technology can only partly be compensated by a country's trade openness, i.e. importing R&D-intensive (IT) goods from abroad. This contrasts to what occurs for less technically-advanced (non-IT) productions, for which trade is an effective conduit for knowledge.