text: Knut Wicksell wrote about the "natural" form of this quantity in a book titled for this concept "and Prices".
full_question: Knut Wicksell wrote about the "natural" form of this quantity in a book titled for this concept "and Prices". Irving Fisher developed an equation to relate two forms of this quantity and the inflation rate. This quantity is the dependent variable in the L-M curve, and is plotted on the y-axis of the IS-LM model. LIBOR ["lie-bor"] is an indexed reference for this quantity, which is overseen by the Federal Open Market Committee. The federal version of this quantity has not been raised since 2006. For 10 points, name this key economic variable, which is paid on deposits and charged on loans.
first_sentence: Knut Wicksell wrote about the "natural" form of this quantity in a book titled for this concept "and Prices".
raw_answer: interest rate [or nominal interest rate; or real interest rate; prompt on "r" or "i"]