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The Haymarket statue was vandalized with black paint on May 4, 1968, the 82nd anniversary of the Haymarket Affair, following a confrontation between police and demonstrators at a protest against the Vietnam War. [127] On October 6, 1969, shortly before the "Days of Rage" protests, the statue was destroyed when a bomb was placed between its legs.
The indices kept by Standard & Poor are normalized to a value of 100 in January 2000. They are based on original work by economists Karl Case and Robert Shiller, whose team calculated the home price index back to 1990. Case and Shiller's index is normalized to a value of 100 in 1990. The Case-Shiller index on Shiller's website is updated ...
Case-Shiller Home Price Index. A house price index (HPI) measures the price changes of residential housing as a percentage change from some specific start date (which has an HPI of 100). Methodologies commonly used to calculate an HPI are hedonic regression (HR), simple moving average (SMA), and repeat-sales regression (RSR).
In addition to the 5.4 percent overall increase, June numbers increased annually for both of Case-Shiller’s composite indices as well, with the 10-city index up 7.4 percent and the 20-city index ...
The Herfindahl Index (HHI) ranges from 1/N (in case of perfect competition) to 1 (in case of monopoly), where N is the number of firms in the market. Equivalently, if percents are used as whole numbers, as in 75 instead of 0.75, the index can range up to 100 2 , or 10,000.
The Marshall-Edgeworth index, credited to Marshall (1887) and Edgeworth (1925), [11] is a weighted relative of current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12]
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In economics, concentration ratios are used to quantify market concentration and are based on companies' market shares in a given industry.. A concentration ratio (CR) is the sum of the percentage market shares of (a pre-specified number of) the largest firms in an industry.