Digital Infrastructure as Development Infrastructure: Connectivity, Productivity, and Economic Transformation in Emerging Markets

Mobile access has already converged. The production stack has not. In a population-weighted reading of World Bank indicators, 67 percent of people in developing economies used the internet in 2023, against 1.4 percent in 2000. Mobile subscriptions reached 105 per 100 people. Fixed broadband reached 15. In sub-Saharan Africa the same three clocks read 33 percent, 91, and 0.7. High-income broadband is 37. The residual is not a digital divide in the 2000s sense-a missing SIM card. It is a stack gap: electricity, fixed connectivity, secure servers, and the public rails that turn a connection into a transaction, a shipment, or a job. Among 129 developing countries with complete data, 42 meet all four thresholds we use for a full stack, covering 40 percent of developing-country population. Sub-Saharan Africa has two such countries, Mauritius and Seychelles, covering 0.1 percent of regional population. Median GDP per capita in developing stack countries is 19,754 dollars at PPP. In countries with mass mobile and internet below 50 percent it is 4,110. Labour productivity is 48,133 dollars per worker against 17,379. The unconnected headcount fell from 5.5 billion in 2000 to 2.2 billion in 2023. In sub-Saharan Africa it rose, from 671 million to 802 million: population outran the network. ICT service exports make the selection visible in trade. Developing-country ICT service exports were 86 billion dollars in 2010 and 284 billion in 2023. India supplied 57 percent of that 2023 total. Sub-Saharan Africa supplied 4.4 billion. A phone is consumer infrastructure. Development infrastructure is the complementary stack that lets a firm, a farm, or a state use the phone as a production input.