In this chapter, Professor Jeffrey Sachs introduces the course on macroeconomics for a sustainable planet, as well as his co-professor, Felipe Larraín, Chile’s Finance Minister. Sachs discusses eight concepts central to the study of macroeconomics. The first is the gross domestic product; the second is the overall unemployment of the country; the third is whether income and living standards are rising over time, or what is the long-term development of the economy; the fourth is the Consumer Price Index; the fifth is saving and investment; the sixth is capital stock; the seventh is debt; and the eighth is inequality.

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