Digital Infrastructure. Shane Greenstein, November 15, 2019, Paper, “What determines variance in the supply of innovative digital infrastructure, and how does it shape economic outcomes? The first half of the essay covers the economic impact of deployment and adoption of access services, while the latter part of the essay covers complementary activities that enables internet access to deliver better performance. The latter discussion uses examples to illustrate broad observations and issues, especially where statistical research lags business practices. This essay emphasizes economic research about the United States and covers the global experience when possible. It stresses the large number of unanswered policy-relevant research questions.Link