Artificial intelligence is generating unprecedented investment and uncertainty. This book argues that AI outcomes depend less on the technology itself and more on what it combines with: data quality, management capability, workforce skills, governance capacity and institutional design. A structured framework for policymakers and executives making decisions before the evidence is complete.

Why does the same technology lift productivity in some places and disappoint in others? The complementarity thesis explains the gap: returns depend on what technology is combined with. Applied to innovation districts, value comes from complements across placemaking, economics, business, and governance, underpinned by infrastructure. Leadership, collaboration, and learning mindsets become practical policy levers, not soft extras.