We evaluate the impact of mobile operator mergers on the unit price of data and voice by using country-level observations on retail revenue for data, cellular data traffic, retail revenue for voice, and outgoing voice minutes. Using a difference-in-differences estimation strategy, we estimate the effect of operator merger by comparing the difference between the non-merging countries and the merging countries before and after the introduction of the operator merger. In accordance with the theoretical prediction provided in this paper, we empirically find that mergers tend to decrease the data unit price and increase the voice unit price.

中文翻译：

---

移动运营商合并对单价的影响

我们通过使用国家/地区级的数据零售收入，蜂窝数据流量，语音零售收入和传出通话时间来评估移动运营商合并对数据和语音单价的影响。我们使用差异差异估计策略，通过比较运营商合并前后非合并国家与合并国家之间的差异来评估运营商合并的效果。根据本文提供的理论预测，根据经验，我们发现合并趋向于降低数据单价并增加语音单价。