Seminar paper from the year 2013 in the subject Economics - Monetary theory and policy, grade: 1,8, Justus-Liebig-University Giessen, language: English, abstract: This Paper aims to explain the effects of money in an economy. The beginning of the Paper analyses the money supply, the money demand and which variables determinate it or how they influence them. Further the paper analyses how the money stock could be used by the central bank and the government as monetary instrument to invent into economy. At certain stages endnotes will refer to the interest rate theory and try to answer, how strong it influences the money amount.