Why firms should be experimenting with marketing

Listen as LBS faculty discuss their recent research into how television advertising influences online consumer sales


In this episode of the Why podcast, London Business School’s Anja Lambrecht and Xu Zhang discuss their recent research into how TV ads influence online sales for a major travel website, exploring how their findings challenge conventional views about their value.

The research suggests that spikes in sales following an advert are not necessarily incremental sales, but instead an acceleration of sales that would have happened at a later time, an effect they term “intertemporal substitution”.

They also talk about the vital role played by a field experiment in helping them arrive at their findings, and delve into why firms should undertake more of this type of experiment.

Anja Lambrecht is Professor of Marketing at London Business School and Xu Zhang is Assistant Professor of Marketing.

Zoë Stumpf is Head of Thought Leadership & Research Amplification at London Business School.



For more thought leadership and business insights from London Business School faculty and alumni, visit Think at London Business School

Sign up here to receive a curated selection of articles, podcasts and films direct to your inbox twice a month. 

Follow us on social media:




Discover fresh perspectives and research insights from LBS


Think at London Business School

Ways to grow your personal brand

Can we really use brand-marketing principles to build our careers? We sure can, says Adjunct Associate Professor of Marketing Helen Edwards

By Helen Edwards

Find out more