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  2. Length contraction - Wikipedia

    en.wikipedia.org/wiki/Length_contraction

    Length contraction is the phenomenon that a moving object's length is measured to be shorter than its proper length, which is the length as measured in the object's own rest frame. [1] It is also known as Lorentz contraction or Lorentz–FitzGerald contraction (after Hendrik Lorentz and George Francis FitzGerald ) and is usually only noticeable ...

  3. List of unsolved problems in economics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    "Thirteen critical points in contemporary economic theory". Journal of Economic Literature. 10 (4): 1163– 1189. JSTOR 2721542. Alessandro Innocenti (1995). "Oskar Morgenstern and the Heterodox Potentialities of the Application of Game Theory to Economics". Journal of the History of Economic Thought. 17 (2): 205– 227. doi:10.1017 ...

  4. Lorentz ether theory - Wikipedia

    en.wikipedia.org/wiki/Lorentz_ether_theory

    The so-called Length contraction without expansion perpendicularly to the line of motion and by the precise value = / (where l 0 is the length at rest in the aether) was given by Larmor in 1897 and by Lorentz in 1904. In the same year, Lorentz also argued that electrons themselves are also affected by this contraction.

  5. The General Theory of Employment, Interest and Money

    en.wikipedia.org/wiki/The_General_Theory_of...

    The General Theory of Employment, Interest and Money is a book by English economist John Maynard Keynes published in February 1936. It caused a profound shift in economic thought, [1] giving macroeconomics a central place in economic theory and contributing much of its terminology [2] – the "Keynesian Revolution".

  6. List of recessions in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_recessions_in_the...

    This is the longest period of economic contraction recognized by the NBER, though the Long Depression is sometimes held to be the entire period from October 1873 to December 1896. [23] [24] Depression of 1882–1885: March 1882 – May 1885 3 years 2 months 3 years −32.8% −24.6%

  7. Economic expansion - Wikipedia

    en.wikipedia.org/wiki/Economic_expansion

    Economic expansion and contraction refer to the overall output of all goods and services, while the terms "inflation" and "deflation" refer to rising and falling prices of commodities, goods and services in relation to the value of money. [4] From a microeconomic standpoint, expansion usually means enlarging the scale of a single company or ...

  8. Hemline index - Wikipedia

    en.wikipedia.org/wiki/Hemline_index

    The hemline index is a theory that suggests that skirt length (hemlines) rise or fall along with stock prices. The most common version of the theory is that skirt lengths get shorter in good economic times (1920s, 1960s) [1] and longer in bad, such as after the 1929 Wall Street crash. However, the reverse has also been proposed with longer ...

  9. Bell's spaceship paradox - Wikipedia

    en.wikipedia.org/wiki/Bell's_spaceship_paradox

    So, calculations made in both frames show that the thread will break; in S′ due to the non-simultaneous acceleration and the increasing distance between the spaceships, and in S due to length contraction of the thread. In the following, the rest length [3] or proper length [4] of an object