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A macroeconomic model is an analytical tool designed to describe the operation of the problems of economy of a country or a region. These models are usually designed to examine the comparative statics and dynamics of aggregate quantities such as the total amount of goods and services produced, total income earned, the level of employment of productive resources, and the level of prices.
Macroeconomics encompasses a variety of concepts and variables, but above all the three central macroeconomic variables are output, unemployment, and inflation. [ 5 ] : 39 Besides, the time horizon varies for different types of macroeconomic topics, and this distinction is crucial for many research and policy debates.
The two topics can be treated together because they are different ways of analysing the same equation. Keynes's presentation is informal. To make it more precise we will identify a set of 4 variables – saving, investment, the rate of interest, and the national income – and a parallel set of 4 equations which jointly determine them.
The earlier term for the discipline was "political economy", but since the late 19th century, it has commonly been called "economics". [22] The term is ultimately derived from Ancient Greek οἰκονομία (oikonomia) which is a term for the "way (nomos) to run a household (oikos)", or in other words the know-how of an οἰκονομικός (oikonomikos), or "household or homestead manager".
Major topics include measurement of economic performance, national income and price determination, fiscal and monetary policy, and international economics and growth. AP Macroeconomics is frequently taught in conjunction with (and, in some cases, in the same year as) AP Microeconomics as part of a comprehensive AP Economics curriculum, although ...
In their macroeconomic models, the economic system is a subsystem of the environment. In this model, the circular flow of income diagram is replaced in ecological economics by a more complex flow diagram reflecting the input of solar energy, which sustains natural inputs and environmental services which are then used as units of production ...
The Establishment of the International Monetary Fund (IMF) and the World Bank are one of the most significant turning points in the History of international finance. Through Decades of negotiation between international powers and the persistence of economic superpowers no single event inspired unity of determining the fair rules of trade and monetary policy than the Second World War.
The classification of some macroeconomic variables as instruments and some others as targets or objectives is originally due to Jan Tinbergen, who used these concepts in his books On the Theory of Economic Policy (1952) and Economic Policy: Principles and Design (1955). [3]