“…This is also the reason, why the authors raise the question BIs paid search overrated?^, as previous research found positive effects of sponsored search on revenues (usually of online firms), but did not have a good baseline, the counterfactual, to compare it to. Schlangenotto et al (2018) show that in their sample, paid search does help to increase the reach of marketing efforts (coupons in their case), but ultimately does not translate into more offline sales. Thus, they caution brickand-mortar stores not to burn too much money in paid search advertising.…”