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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.
Modern macroeconomics can be said to have begun with Keynes and the publication of his book The General Theory of Employment, Interest and Money in 1936. [22] Keynes expanded on the concept of liquidity preferences and built a general theory of how the economy worked.
Law and economics, or economic analysis of law, is an approach to legal theory that applies methods of economics to law. It includes the use of economic concepts to explain the effects of legal rules, to assess which legal rules are economically efficient, and to predict what the legal rules will be. [177]
In macroeconomics, a multiplier is a factor of proportionality that measures how much an endogenous variable changes in response to a change in some exogenous variable. For example, suppose variable x changes by k units, which causes another variable y to change by M × k units. Then the multiplier is M.
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.
The implication of this is that poverty will ultimately disappear 'by itself'. It does not explain why some nations have had zero growth for many decades (e.g. in Sub-Saharan Africa) Conditional convergence: A country's income per worker converges to a country-specific long-run level as determined by the structural characteristics of that country.
The Babylonians and their city state neighbors developed forms of economics comparable to currently used civil society (law) concepts. They developed the first known codified legal and administrative systems, complete with courts, jails, and government records. [10] The ancient economy was based primarily on subsistence farming. [11]
People queue up for soup and bread at relief tents in the aftermath of the Great Seattle Fire of June 6, 1889. In economics, scarcity "refers to the basic fact of life that there exists only a finite amount of human and nonhuman resources which the best technical knowledge is capable of using to produce only limited maximum amounts of each economic good."