Cell-Phone-Only Diary Markets Announced for Spring 2009
Addition of households without landline telephones is designed to improve 18-34 sample performance.

NEW YORK; November 13, 2008 – Arbitron Inc. (NYSE: ARB) today released the list of 50 diary markets that are scheduled to include cell-phone-only households in the radio survey sample beginning with Spring 2009 survey.

Spring 2009 Cell-Phone-Only Diary Markets 

Market	Rank		Market	Rank
Ft. Myers-Naples-Marco Island	61		Champaign IL	220
Gainesville-Ocala	81		Olean NY	224
Des Moines	90		La Crosse WI	229
Spokane	92		Charlottesville VA	231
Madison	98		Lafayette IN	240
Lexington-Fayette	104		Bloomington	241
Ft. Collins-Greeley CO	120		Marion-Carbondale ( Southern IL )	243
Lansing-East Lansing	125		Dubuque IA	244
Fayetteville (NW Arkansas )	132		Eau Claire WI	245
Appleton-Oshkosh	135		Pueblo	248
Eugene-Springfield	147		Columbia MO	249
Ann Arbor	148		State College PA	252
Wilmington NC	161		Waterloo-Cedar Falls	253
Lincoln	172		Billings MT	261
Lubbock	181		Hamptons-Riverhead	263
Kalamazoo	186		Battle Creek MI	265
Cape Cod MA	193		Grand Island-Kearney NE	267
Salina-Manhattan KS	203		Harrisonburg VA	273
Bend OR	205		Mankato-New Ulm-St. Peter MN	275
Medford-Ashland OR	208		Sheboygan WI	281
Cedar Rapids	210		Bismarck ND	286
Duluth-Superior	211		Sebring	288
Muncie-Marion IN	215		Hot Springs AR	291
St. Cloud MN	216		Grand Forks ND-MN	292
Fargo-Moorhead	218		Mason City IA	297

Arbitron also plans to expand cell-phone-only household sampling to an additional 75 diary markets with the Fall 2009 survey.

The company’s goal is to sample cell-phone-only households in all diary markets. The specific timing of further deployment of cell-phone-only sampling will be informed by the results of our Spring and Fall 2009 implementation.

Portable People Meter^TM markets already include cell-phone-only households in their panels.

How the 50 markets for Spring 2009 were selected 
Markets were selected for Spring 2009 implementation based on their historical Persons 18-34 sample proportionality and where Arbitron expects the most likely benefit from the addition of cell-phone-only sampling.

Arbitron created a selection process, which includes two years of historical sample proportionality data (eight books for continuous markets through Summer 2008, four books for non-continuous markets through Spring 2008) for Men 18-24, Women 18-24, Men 25-34 and Women 25-34 for diary-based markets. Factors included in the calculation are the respective market's proportionality in each 18-34 demographic cell compared to that cell’s national average and a weight to account for the extent that the national average varies from a 100 proportionality index.

The market selection for the additional 75 markets for the Fall 2009 expansion of cell-phone-only sampling will be conducted next spring based on more current sample proportionality data (eight books for continuous markets through Winter 2009, four books for non-continuous markets through Fall 2008.)

About Arbitron 
Arbitron Inc. (NYSE: ARB) is a media and marketing research firm serving the media – radio, television, cable, online radio and out-of-home – as well as advertisers and advertising agencies in the United States. Arbitron’s core businesses are measuring network and local market radio audiences across the United States; surveying the retail, media and product patterns of local market consumers; and providing application software used for analyzing media audience and marketing information data. The company has developed the Portable People Meter, a new technology for media and marketing research.

Through its Scarborough Research joint venture with The Nielsen Company, Arbitron provides additional media and marketing research services to the broadcast television, newspaper and online industries.

Arbitron’s marketing and business units are supported by a world-renowned research and technology organization located in Columbia, Maryland. Arbitron’s executive offices are located in New York City.

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Portable People Meter^TM and PPM^TM are marks of Arbitron Inc.

Arbitron Forward-Looking Statements 
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The statements regarding Arbitron Inc. and its subsidiaries in this document that are not historical in nature, particularly those that utilize terminology such as “may,” “will,” “should,” “likely,” ”expects,” “anticipates,” “estimates,” “believes,” or “plans,” or comparable terminology, are forward-looking statements based on current expectations about future events, which we have derived from information currently available to us. These forward-looking statements involve known and unknown risks and uncertainties that may cause our results to be materially different from results implied in such forward-looking statements. These risks and uncertainties include, in no particular order, whether we will be able to:

• absorb costs related to legal proceedings and governmental entity interactions and avoid related fines, limitations, or conditions on our business activities; 
• successfully implement the commercialization of our Portable People Meter^TM service; 
• successfully maintain and promote industry usage of our services, a critical mass of broadcaster encoding, and the proper understanding of our audience measurement services and methodology in light of governmental regulation, legislation, litigation, activism or adverse public relations efforts; 
• successfully design, recruit and maintain PPM panels that appropriately balance research quality, panel size and operational cost; 
• complete the Media Rating Council (“MRC”) audits of our local market PPM ratings services in a timely manner and successfully obtain and/or maintain MRC accreditation for our audience measurement business; 
• renew contracts with key customers ; 
• successfully execute our business strategies, including entering into potential acquisition, joint-venture or other material third-party agreements; 
• effectively manage the impact, if any, of any further ownership shifts in the radio and advertising agency industries; 
• respond to rapidly changing technological needs of our customer base, including creating new proprietary software systems and new customer products and services that meet these needs in a timely manner; 
• successfully manage the impact on our business of any economic downturn, generally, and in the advertising market, in particular; 
• successfully manage the impact on costs of data collection due to lower respondent cooperation in surveys, privacy concerns, consumer trends, technology changes and/or government regulations; and 
• successfully develop and implement technology solutions to measure new forms of audio content and delivery, multimedia and advertising in an increasingly competitive environment.

There are a number of additional important factors that could cause actual events or our actual results to differ materially from those indicated by such forward-looking statements, including, without limitation, the risk factors set forth in the caption “ITEM 1A. — RISK FACTORS” in our Annual Report on Form 10-K for the year ended December 31, 2007, our Quarterly Report on Form 10-Q for the period ended September 30, 2008, and elsewhere, and any subsequent periodic or current reports filed by us with the Securities and Exchange Commission. In addition, any forward-looking statements contained in this document represent our estimates only as of the date hereof, and should not be relied upon as representing our estimates as of any subsequent date. While we may elect to update forward-looking statements at some point in the future, we specifically disclaim any obligation to do so, even if our estimates change.