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https://twitter.com/BrianCAlbrecht/status/1602715987572408321@coreeconteam has a fantastic free introductory textbook to economics: core-econ.org/the-economy/en/
https://twitter.com/michael_nielsen/status/1494674891399843842?s=20&t=NMeqqkcJpmXa42lvRviXvgAssume we have a general aggregate production function linking GDP (measured in real output) at time t (denoted Y(t)) to capital and labor at time t via a function f(.) and TFP at time t (denoted A(t)):