The Economic Impact of Wireless Number Portability
研究了美国引入号码可携性后无线运营商的价格反应，发现价格下降但不同套餐降幅不同，高用量用户受益更多。
This paper examines the price response of wireless carriers to the introduction of number portability in the U . S . I find that wireless prices decreased in response to number portability, but not uniformly across plans. Average prices for the plans with the fewest minutes decreased by only $0.19/month (0.97%), but average prices for medium and high‐volume plans decreased by $3.64/month (4.84%) and $10.29/month (6.81%), respectively. The results suggest that higher‐volume users in the wireless market benefited more from the policy‐induced reduction in switching costs.