  This is an expanded version of the lecture given at the AMS Short Course on
Mean Field Games, on January 13, 2020 in Denver CO. The assignment was to
discuss applications of Mean Field Games in finance and economics. I need to
admit upfront that several of the examples reviewed in this chapter were
already discussed in book form. Still, they are here accompanied with
discussions of, and references to, works which appeared over the last three
years. Moreover, several completely new sections are added to show how recent
developments in financial engineering and economics can benefit from being
viewed through the lens of the Mean Field Game paradigm. The new financial
engineering applications deal with bitcoin mining and the energy markets, while
the new economic applications concern models offering a smooth transition
between macro-economics and finance, and contract theory.
