DMA are a product of Nielsen who can change them anytime it wants.
Now the federal government uses Nielsen's markets just because it's easier to do so, than create their own.
I just finished a great book on the history of cable TV and almost all of these small or odd markets were the result of strong politicians in Congress. It amazes me how much fiddling they did.
I also think in some cases the big four networks can influence DMA maps.
Suppose Comcast/NBC made a deal with WFMZ 69 in Allentown where Ch. 69 picks up NBC affiliation and Comcast agrees that WCAU and WNBC are not seen on Lehigh Valley cable systems. I think WNBC was already removed actually. In exchange, WFMZ is deleted from all the Comcast systems in the Philly DMA and there is reverse compensation involved. I don't see it happening but let's say WFMZ was losing money in it's current form and wanted the deal. Wouldn't such trigger an Allentown DMA? Or would the power from KYW (CBS), WPVI (ABC) and WTXF (Fox) work to keep it within Philly market?
I always thought Allentown was too far from the Philly region and the only thing tying it to Philly was the DMA. It's not in the same MSA and the region is supposedly having ties to the New York region more.
US Air operates a ABE-PHL flight which is indicative that area is far enough away to warrant a flight. There is also a Flagstaff to PHX flight and both are within the PHX DMA but it's likely not unusual out west. Do other airline hubs, possibly LAX or DEN, have a regional jet flight to an airport that's within it's DMA?
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