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Equity premium puzzle: The equity premium puzzle is thought to be one of the most important outstanding questions in neoclassical economics. [6] It is founded on the basis that over the last one hundred years or so the average real return to stocks in the US has been substantially higher than that of bonds.
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The question is whether or not, for all problems for which an algorithm can verify a given solution quickly (that is, in polynomial time), an algorithm can also find that solution quickly. Since the former describes the class of problems termed NP, while the latter describes P, the question is equivalent to asking whether all problems in NP are ...
Economists Claudio Borio and Piti Disyatat of the Bank for International Settlements have argued that the Feldstein–Horioka puzzle arises due to mainstream economic modeling approaches which equate saving in real terms with financing in money terms. Using a framework in which the saving–investment nexus is distinct from money financing ...
Coin exchange crisis of 692.Byzantine emperor Justinian II refuses to accept tribute from the Umayyad Caliphate with new Arab gold coins for fear of exposing double counting in the Byzantine financial system (actual weight less, than nominal quantity), which leads to the Battle of Sebastopolis and the revolt of taxpayers who burned financial officials in a copper bull.
Goldbach’s Conjecture. One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes ...
There are many longstanding unsolved problems in mathematics for which a solution has still not yet been found. The notable unsolved problems in statistics are generally of a different flavor; according to John Tukey, [1] "difficulties in identifying problems have delayed statistics far more than difficulties in solving problems."
This list of global issues presents problems or phenomena affecting people around the world, including but not limited to widespread social issues, economic issues, and environmental issues. Organizations that maintain or have published an official list of global issues include the United Nations, and the World Economic Forum.