Economy and Revolution in the News

Is there any real evidence explaining this analysis or contributing to understanding it? What other sources can shed some light on this? Has Google changed their way of indexing news? Perhaps the news was saturated by the inauguration to the exclusion of everything else? If so, then we will probably see a return to normal news levels for the word "economy" soon in Google News stories trend?

Take a look at the results of a Google Trends search on the Google News reference volume of occurrence (look at the bottom trend line) for the word "economy".

http://www.google.com/trends?q=economy&date=all&geo=all&ctab=0&sort=0&sa=N

The most recent Google News reference volume, January/Feb. 2009 shows an extreme, abrupt, abnormal trend decline for use the word "economy" in Google News stories.

What caused the decline of mention of the word "economy" in Google news stories?? Note that there is no decline in the general search index on this word. Very unusual to have less mention of the word "economy" in Google News stories when it is the biggest news.

The above Google trend link is for all regions of the world. It is very important to note that regardless of the region of search selected, (try Canada) the complete Google News volume reference graph for "economy" remains exactly the same. Consequently, there appears to be no way to determine exactly where the decline in Google News reference to the word "economy"is coming from.

This is an explanation of Google News reference volume taken from Google:
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"Is the news reference volume graph scaled?
No. The graph is for illustrative purposes, and simply shows you the number of times your topic appeared in Google News stories."
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Why does a Google news trend search on the word "revolution" also show a similar unusual, abrupt, extreme decline in the use of the word "revolution" in Google News stories in the same time frame? The drop on the chart is extreme.

http://www.google.com/trends?q=revolution&ctab=0&geo=all&date=all&sort=0

.. that it installed a filter on the
word "economy" or something.

It was brought to my attention that the same decline in Google News stories trend applies to "School" and "Eduction" implying a systemic problem within Google.

http://www.google.com/trends?q=School

http://www.google.com/trends?q=education