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In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the very early universe.Following the inflationary period, the universe continued to expand, but at a slower rate.
The scale factor is a function of time and is conventionally set to be = at the present time. Because the universe is expanding, a {\displaystyle a} is smaller in the past and larger in the future. Extrapolating back in time with certain cosmological models will yield a moment when the scale factor was zero; our current understanding of ...
Vacuum state is a configuration of quantum fields representing a local minimum (but not necessarily a global minimum) of energy. Inflationary models propose that at approximately 10 −36 seconds after the Big Bang, vacuum state of the Universe was different from the one seen at the present time: the inflationary vacuum had a much higher energy density.
There are different types of inflation that could affect your long-term savings and investments. One such type is called cost-push inflation, which happens when prices go up because production ...
Chained dollars is a method of adjusting real dollar amounts for inflation over time, to allow the comparison of figures from different years. [1] The U.S. Department of Commerce introduced the chained-dollar measure in 1996. It generally reflects dollar figures computed with 2012 as the base year. [2]
A CPI is a statistical estimate constructed using the prices of a sample of representative items whose prices are collected periodically. Sub-indices and sub-sub-indices can be computed for different categories and sub-categories of goods and services, which are combined to produce the overall index with weights reflecting their shares in the total of the consumer expenditures covered by the ...
As the most widely used measure of inflation, the CPI is an indicator of the effectiveness of government fiscal and monetary policy, especially for inflation-targeting monetary policy by the Federal Reserve. Now however, the Federal Reserve System targets the personal consumption expenditures (PCE) price index instead of CPI as a measure of ...
Price hikes slowed more than expected in July, and, for the first time in more than three years, the Consumer Price Index has landed below 3%.