Technology plays a central role in economic transformation. Yet relatively few teams of economists and engineers work together to maximize technology's impact on international development. In his address, Berkeley Professor Edward Miguel describes the experimental methodologies that today's economists employ in their work, and cases where their research findings have contributed to large-scale policy change. Looking forward, he argues that deeper engagement between economists, data scientists and engineers can accelerate a new wave of policy innovation and improve understanding of what really "works" in development, providing a valuable global public good.