Book excerpt: Intertemporal macroeconomics links microeconomics and growth theory methods. The effects of policies are examined as the dynamic interaction between decisions of agents and policy interventions. The book explores the two basic approaches of models of infinitely-lived agents (Cass-Ramsey-Koopmans approach) and models of overlapping-generations (Allais-Fisher-Samuelson approach). Controversial questions concerning monetary models and monetary policies are also considered in a systematic way. The book also introduces both real models and monetary models of endogenous growth.