Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of staffing agency Robert Half International (NYSE: RHI) jumped as much as 12% today after the company released earnings.

So what: During the first quarter, revenue rose 15% to $1.02 billion, beating expectations of $989.1 million from analysts. Profit grew 83% to $0.34 per share, $0.06 ahead of estimates.

Now what: The United States is driving the growth with revenue increasing 19.6% from a year ago, something that might surprise some observers. The other positive trend is that job placements are up 28% versus temporary placements up 19%, a sign that the job market is recovering. Shares are now trading at 18 times forward estimates, and I think the stock has room to run as the economy improves.

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Fool contributor Travis Hoium does not have a position in any company mentioned. You can follow Travis on Twitter at @FlushDrawFool, check out his personal stock holdings or follow his CAPS picks at TMFFlushDraw.

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