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A good introductory book with a lot of data and statistics provided is: "Macroeconomics: Understanding the Global Economy" by David Miles and Andrew Scott. You can find the link to the book here: Macroeconomics - Miles/Scott It uses a lot of real world examples to relate economic concepts with real data and explain observed economic phenomena. If you are ...


this is related to the concept of Jensen inequality. basically, $\frac{f(x-|\delta|)+f(x+|\delta|)}{2}\ne f(x)$, for convex functions it's $>f(x)$, and for concave ones $<f(x)$. risk averse guys have concave utilities, that's the relation you need to look at

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