Eastlan has emerged as a critical fault line in the ongoing legal fight between Cumulus Media and Nielsen, serving as the real-world test of whether a viable alternative to Nielsen’s national radio ratings exists. The case, underway since October in the U.S. District Court for the Southern District of New York, positions Eastlan as the only measurement firm even plausibly capable of constraining Nielsen’s dominance.
Cumulus argues that Eastlan’s limitations prove the opposite of competition. In court filings, the company states that Eastlan “does not operate in the market for national radio ratings data” and lacks any product comparable to Nielsen Nationwide. To Cumulus, that absence is not incidental but structural, demonstrating that national radio measurement is a distinct market in which Nielsen stands alone.
Testimony from Eastlan CEO Mike Gould largely supports that view. Gould confirmed that Eastlan does not currently offer a national ratings service, though he acknowledged the company could develop a “nationwide-like product” within a year if customers were willing to fund the data collection. Cumulus seizes on that distinction, arguing that theoretical capability does not constitute actual competition. Eastlan’s strength, it says, remains in smaller diary markets, often those Nielsen has exited, leaving little direct overlap.
The filings also emphasize barriers that extend beyond cost or technology. Gould testified that even if Eastlan launched a national product, it would face resistance from advertisers and agencies accustomed to Nielsen as the industry currency. Many agencies, he said, remain “Nielsen-only shops,” because that data is how national radio advertising is bought and sold. Compounding the problem, Eastlan data cannot currently transact through key buying platforms such as Act 1 and Mediaocean, which accept only Nielsen inputs.
Cumulus argues that these structural constraints amount to market foreclosure. Even Eastlan’s lower pricing and hybrid methodology, which combines electronic diaries and telephone interviews to broaden sample representation, cannot overcome a system built entirely around Nielsen data. Without acceptance by buyers and platforms, Cumulus contends, Nielsen Nationwide remains the only functional gateway to national radio ad dollars.
Nielsen disputes that framing, arguing that Eastlan’s absence from national measurement is a business choice, not exclusion. Nielsen points to Eastlan’s expansion into larger local markets as evidence that competition exists and that entry into national ratings would occur if demand justified it.
Cumulus calls that argument speculative. The court, it insists, must evaluate the market as it exists today. With no national ratings product offered, planned, or marketed by Eastlan, Cumulus maintains that Nielsen remains an unavoidable bottleneck. How the court weighs Eastlan’s unrealized potential may ultimately determine whether national radio measurement is treated as a competitive market or a monopoly.