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  2. Efficient-market hypothesis - Wikipedia

    en.wikipedia.org/wiki/Efficient-market_hypothesis

    The theory of efficient markets has been practically applied in the field of Securities Class Action Litigation. Efficient market theory, in conjunction with "fraud-on-the-market theory", has been used in Securities Class Action Litigation to both justify and as mechanism for the calculation of damages. [71] In the Supreme Court Case ...

  3. Economic efficiency - Wikipedia

    en.wikipedia.org/wiki/Economic_efficiency

    The first fundamental welfare theorem provides some basis for the belief in efficiency of market economies, as it states that any perfectly competitive market equilibrium is Pareto efficient. The assumption of perfect competition means that this result is only valid in the absence of market imperfections , which are significant in real markets.

  4. Public economics - Wikipedia

    en.wikipedia.org/wiki/Public_economics

    Public economics (or economics of the public sector) is the study of government policy through the lens of economic efficiency and equity.Public economics builds on the theory of welfare economics and is ultimately used as a tool to improve social welfare.

  5. A Guide To Efficient Market Theory - AOL

    www.aol.com/news/guide-efficient-market-theory...

    Efficient market theory, or hypothesis, holds that a security's price reflects all relevant and known information about that asset. One upshot of this theory is that, on a risk-adjusted basis, you ...

  6. Why the Efficient Markets Hypothesis Is a "Half-Truth" - AOL

    www.aol.com/news/2012-04-16-why-the-efficient...

    Late last month, Robert Shiller stopped by Motley Fool Headquarters for an hour-long interview about housing, stocks, bubbles, and more. A Yale professor who just published his 10th book, Finance ...

  7. Glossary of economics - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_economics

    Also called resource cost advantage. The ability of a party (whether an individual, firm, or country) to produce a greater quantity of a good, product, or service than competitors using the same amount of resources. absorption The total demand for all final marketed goods and services by all economic agents resident in an economy, regardless of the origin of the goods and services themselves ...

  8. Fundamental theorems of welfare economics - Wikipedia

    en.wikipedia.org/wiki/Fundamental_theorems_of...

    A government facing the same information constraints as the private individuals in the economy can nevertheless find Pareto-improving policy interventions. [ 34 ] Greenwald and Stiglitz noted several relevant situations, including how moral hazard may render a situation inefficient (e.g. an alcohol tax may be pareto improving as it reduces ...

  9. Financial market efficiency - Wikipedia

    en.wikipedia.org/wiki/Financial_market_efficiency

    Another theory related to the efficient market hypothesis created by Louis Bachelier is the "random walk" theory, which states that prices in the financial markets evolve randomly. Therefore, identifying trends or patterns of price changes in a market can't be used to predict the future value of financial instruments .