Economic Bifurcation and Chaos rigorously explores instability and chaos in macro models, including New Keynesian and endogenous growth frameworks. Authored by Barnett and Han, this path-breaking work uses nonlinear dynamics to warn that parameter uncertainty and bifurcation boundaries severely compromise policy robustness. Empirical findings, notably Shilnikov chaos in US/UK data, underscore the urgent need for structural rigor and advanced techniques to model and control complex economic dynamics.