A new volume from the World Bank, Office of Chief Economist:

…developing economies face an investment shortfall of historic proportions. Even as development needs rise, investment growth has slowed to about half its pace in the 2000s. Public investment alone cannot fill this gap. Private investment must play the leading role in reigniting growth, creating jobs, and supporting the transition to a more sustainable and resilient future.

This book presents the World Bank’s most comprehensive assessment of investment in emerging and developing economies. …

Here’s a motivating graph:

Source: World Bank, Accelerating Investment: Challenges and Policies (September 2025).