The Google Unemployment Index
google.com
google.com
Edit: answering my own question with the help of Google Custom Date Range search:
http://www.google.com/search?q=unemployment&tbs=cdr:1,cd...
The senate passed a law extending unemployment benefits on July 20, so I bet everybody affected for it saw the news story and searched to find out how the law affected them.
Passed in Senate: July 20, 2010. Passed in Congress: July 22, 2010. Signed by President Obama: July 23, 2010.
http://www.worldcorrespondents.com/unemployment-extension-ju...
It is also possible that white collar un-/underemployed aren't looking as hard during the holiday season because most offices are themselves so distracted by the holiday seasons. Anecdotally speaking, I've noticed a trend toward reduced hiring by companies during the the holidays.
Finally, purely speculative but American companies may tend to avoid firing people during the holidays. Firing someone before Xmas is one of those tropes that appears in television dramas and comedies and is often performed by the "evil boss". This myth likely has some basis in fact.
I never really thought of the seasonal jobs thing because my site is focused on permanent full-time jobs/careers, but I'd bet it's at least part of the trend.
My hunch is that it's more related to New Year's Resolutions along with some other factors. Not a lot of hiring gets done between Thanksgiving and Christmas beyond seasonal jobs. Most companies lay low during that period, and some are also waiting for new budgets for the new year. Basically, companies wait until after the holidays to start hiring again, and most job seekers take a break during the holidays too. The trend also applies to internship searches, so that's why I think it's not just people looking for a new opportunity after seasonal employment ends.
At Microsoft or Amazon, at least a few years ago when I saw the HR numbers, at any given time, ~20% of the total pool of workers can be temp contractors, so that is a sizable numbers of workers coming and going each December, at least on paper, even if those workers stay on as contractors for many years. (As an aside, I've always wondered why this doesn't generate the same amount of bad PR as the entire video game industry, especially the "EA slave-ship").
I don't have nearly as much direct experience outside of the software industry, but I imagine other industries are doing likewise and on a far broader scale.
Extending this employment pattern to the whole economy, it might explain a big percentage of these mysterious to pin-down "seasonal workers." Or perhaps the labor statistics are just being fudged across the board(thanks US BLS!), from the top down, to try to keep a lid on the worsening unemployment and underemployment situation. I suspect it's a lot of both.
Since the 70's America has been hemorrhaging "real jobs"—i.e. non-service-sector jobs that actually pay an inflation adjusted living wage. Those of us fortunate enough to win the career lottery by going into tech have been quite shielded from the backdrop of the economic decline, and the mass exporting of (manufacturing mostly?) jobs to overseas.
Half of this is mostly true, the other half is mostly not true. Tons of major companies in the service sector offer their employees (even their part-time employees) health, dental, and vacation. And employment should pretty much always be termination at will, unless the employee is under a contract and can't leave whenever they want, or is fired due to a protected class, whistleblowing, etc.
I can't speak for everyone, but I know plenty of contractors (myself included) who have absolutely no interest in FTE with a company. I make much better money and have a lot more flexibility as a contractor / consultant than I ever would as an employee.
This would break down near the end of the year in the USA when the volume of searches goes up as people shop online.
I'd guess that the normalization process also applies over time as well, i.e. they compare the number of searches you're interested in vs. the total number of searches within that population.