T-Mobile announced it was close to a merger

Discuss which market model appears to best explain the behavior described:
In fall 2012, T-Mobile announced it was close to a merger with its smaller rival MetroPCS. This merger would strengthen T-Mobile’s position as the fourth-largest wireless operator in the United States. The merger would allow the combined company to cut costs and operate on a larger scale.
15 Anton Troianovski, “T-Mobile Finds a New Lifeline,” Wall Street Journal (Online), October 2, 2012.

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