“…Another possible concern is that our results might be driven by an incorrect identification of upstream and downstream industries, since we used the US input–output matrix. So, following the referee's suggestion, we have classified horizontal and vertical relations using the European Input–Output matrix (see Bodnar, Buchwald, & Weche, ), which provides data at two or more aggregated NACE digit levels (i.e. food, beverage and tobacco products, textiles, wearing apparel, leather and related products) and considers only 19 countries.…”