A short review I wrote at Imperial College discussing Liquidity Preference Theory and Quantity Theory of Money, dated 16 December 2020. — Note: This review was written in conjuction with Adam Wood, Amalie Kjaer, Bastian Shi, Henry Jones and Tom O’Brien. The Quantity Theory of Money (QTM) proposes the following equation: While QTM has been proven to accurately fit certain time-series data sets [1], this essay argues that the model is oversimplified…