Lecture 3: The Goods Market

MIT 14.02 Introduction to Macroeconomics, taught by Professor Ricardo J. Caballero, focuses in this episode on the Goods Market—a core chapter for understanding the determinants of aggregate demand and output. The course begins with the derivation of the IS curve in a closed economy, tracing how key variables such as consumption, investment, and government spending shape equilibrium output, and extends to the interplay between exchange rates and the trade balance in an open-economy setting. Key highlights include an intuitive modeling of the multiplier effect, the transmission channel through which interest rates influence investment, and the policy implications under the short-run assumption of sticky prices. It is well suited for economics undergraduates or self-learners interested in how the macroeconomy operates. A foundational grasp of national income accounting is recommended beforehand; while watching, you can test your familiarity with IS-model derivations using the assigned problem sets. With no superfluous preamble, the lecture dives straight into model building at a brisk pace, making it an ideal stepping-stone for a second, more advanced macroeconomics course.