---

Many of our seminars and public events this year will continue as in person or as hybrid (online and in person) events.

Please check our website listings and Twitter feed @STICERD_LSE for updates.

Unless otherwise specified, in-person seminars are open to the public. Please ensure you have informed the event contact as early as possible.

Those unable to join the seminars in-person are welcome to participate via zoom if the event is hybrid.

---

About this event

Incumbency advantage in U.S. congressional elections has been a well-established feature of American politics. Since the late 2000s, this advantage has significantly declined, falling from a longstanding average of 10 percentage points to just 3, as we document using a regression discontinuity design. We show that this decrease was driven primarily by the expansion of mobile broadband. Both Democrats and Republicans were affected, though the decline was initially greater for the party holding the presidency at the time. Mobile broadband disadvantaged incumbents and benefited challengers. It improved voter knowledge of both, increased disapproval of incumbents, and enhanced challengers? fundraising capacity.