The complexity economics, based on physical algorithms and statistics to analyze economic mass data and time-series, provides an alternative paradigm to the overly-simplified mainstream rationality assumption-based Neoclassical approach for understanding macro growth, structural transformation, climate change, financial crises, trade wars and other real-world phenomena. This Handbook collects recent progresses and new insights by authors in this new discipline. I recommend the book to scholars who are interested in this new approach. Justin Yifu LinProfessor and Dean, Institute of New Structural Economics, Peking University, ChinaFormer Chief Economist, the World BankThe economic system is a supremely complex one. The traditional approach to understanding it has been to reduce complexities to simple rules and behaviors, abstracting many features of the real economy. However, thanks to the enormous increases in both the amount of data available and computing power, there is nowadays an alternative approach: the one proposed by complexity economics, a fast-growing field in economic analysis.The Handbook of Complexity Economics provides a thorough and updated vision of this very promising field and will surely encourage many scholars to deepen research in this area. Victor A. BekerProfessor of Economics, University of Belgrano and University of Buenos Aires, ArgentinaFormer Associate Editor of Journal of Behavior and OrganizationTimely and compact one-volume from a set of economists uniquely positioned to contribute about complexity. The result is an up-to-date, integrated, compelling, canonical guide-book on the contours and contents of an approach that is extremely remunerative for theory as well as actual practice in the 21st century economy. Older and younger generations now have a fresh meeting point from where to breathe new life into the most pressing intellectual and societal challenges of our age.Sandro MendonçaIscte Business School, PortugalFormer communications regulator