It was the last part of the advertising sector to fall and may be the first to recover, but online advertising is now in a recession. With the four largest Web advertising companies ( Google , Yahoo , Microsoft , and AOL ) having reported March quarter financials, we can get a pretty good sense of how the sector did as a whole. If you add up the online advertising revenues of these four online advertising bellwethers, the total online advertising revenues for the quarter came to $7.9 billion, a 2 percent decline from a year ago and a 7 percent decline from the fourth quarter. The growth of online advertising has been slowing down for a while , but this is the first quarter to experience an actual decline in revenues. Given the poor performance reported by all of these companies during the quarter, this shouldn’t come as a surprise. Only Google was able to eke out any annual growth, the rest all saw online advertising revenues drop. The fact that Google’s advertising revenues represents 68 percent of the total and that it saw modest growth helped to dampen the overall decline. On an annual basis, the revenue growth just keeps going down from 18 percent growth in the third quarter to 8 percent in the fourth to this quarter’s 2 percent dip. On a quarter-over-quarter basis,

the decline is even steeper. Other than the slight 3.4 percent rebound we saw last quarter in sequential growth, which appears too have been seasonal, the sequential growth rate has been coming down for at least the past six quarters. These numbers represent global advertising revenues, and include network revenues paid to affiliates through AdSense and Yahoo’s ad network. I’ve stripped out Google’s licensing revenues, and for the other companies include only the advertising portions of their online revenues as reported in their quarterly earnings statements. Those interested in comparing this to more official numbers should note that the IAB, which only recently came out with fourth quarter data, only measures domestic revenues for the industry. You can see the numbers I’m using in the table below. Online Advertising Revenues (in millions) 3Q07 4Q07 1Q08 2Q08 3Q08 4Q08 1Q09 Google $4,190 $4,758 $5,086 $5,185 $5,352 r$5,504 $5,331 Yahoo $1,544 $1,590 $1,572 $1,587 $1,563 $1,594 $1,383 Microsoft $670 $860 $840 $840 $770 $866 $721 AOL $540 $620 $552 $530 $507 $507 $443 Total $6,994 $7,828 $8,050 $8,142 $8,192 $8,467 $7,878 Sequential Growth Q/Q 12.73% 2.84% 1.14% 0.61% 3.4% -6.96% Annual Growth Y/Y 18% 8.16% -2.10% Crunch Network : CrunchBase the free database of technology companies, people, and investors

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The Online Ad Recession Is Officially Here: First Quarterly Decline In Revenues