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A leitmotif or Leitmotiv [1] (/ ˌ l aɪ t m oʊ ˈ t iː f /) is a "short, recurring musical phrase" [2] associated with a particular person, place, or idea. It is closely related to the musical concepts of idée fixe or motto-theme . [ 2 ]
Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.
Economic history is the study of history using methodological tools from economics or with a special attention to economic phenomena. Research is conducted using a combination of historical methods, statistical methods and the application of economic theory to historical situations and institutions.
Hesiod active 750 to 650 BC, a Boeotian who wrote the earliest known work concerning the basic origins of economic thought, contemporary with Homer. [3] Of the 828 verses in his poem Works and Days, the first 383 centered on the fundamental economic problem of scarce resources for the pursuit of numerous and abundant human ends and desires.
From the 21st century onwards, the concept of ecosystem services (the benefits to humans provided by the natural environment and from healthy ecosystems) are more widely studied in economics. [208] Also climate change is more widely acknowledged as a major issue in economics, sparking debates about sustainable development in economics.
Lloyd Stowell Shapley (/ ˈ ʃ æ p l i /; June 2, 1923 – March 12, 2016) was an American mathematician and Nobel Memorial Prize-winning economist.He contributed to the fields of mathematical economics and especially game theory.
To test the viability of his ideas for self-sufficient working communities, Owen began experimenting with communal living in the United States in 1825. Among the most famous efforts was the one set up at New Harmony, Indiana. [6]
Classical economics, also known as the classical school of economics, [1] or classical political economy, is a school of thought in political economy that flourished, primarily in Britain, in the late 18th and early-to-mid 19th century. It includes both the Smithian and Ricardian schools. [2]