This morning, the Bureau of Labor Statistics (BLS) released December 2012 figures for real earnings. This indicator reflects three components of consumer buying power: average hourly earnings, average weekly hours, and price inflation/deflation. Seasonally adjusted real average hourly earnings rose 0.3 percent from November to December; this resulted from a 0.3 percent increase in average hourly earnings combined with no month-over-month change in inflation (as measured by the Consumer Price Index).
The following chart illustrates the monthly percent change in real average hourly earnings. (Figures below reflect the earnings of all employees on private, non-farm payrolls).
The full press release can be found on the BLS website.