台北都會區於2018年4月16日起實施了公共運輸定期票政策。本研究使用迴歸不連續法，估計此政策對於對於台北捷運系統運輸量在短期的處理果。此外，我們也討論了這個政策是否能降低私人運輸工具所帶來的外部性。實證結果顯示此政策增加了捷運站的每日平均進出站人數，民眾受到了此政策的鼓勵，更加願意搭乘捷運。然而，並沒有任何統計上的證據表明此政策能在短期減輕交通阻塞與空氣污染。

A policy of unlimited monthly transit pass was implemented in the Taipei metropolitan area on April 16, 2018. This research uses regression discontinuity design to estimate the short-run treatment effect of the policy on the ridership of the mass rapid transit (MRT) system. In addition, I discuss whether the policy can reduce the externality caused by private vehicles. The results show that the policy increases the average of entries and exits in MRT stations. People are encouraged to take the MRT through the policy. However, there is no evidence that the policy can mitigate traffic congestion and air pollution in the short run.

方炳超 (2019年4月23日)。 1280月票滿周年》雙北共砸9億到底成效如何？3張「成績單」帶你看定期票政策。取 https://www.storm.mg/article/1202145

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