This research is based on US import data (US Census), as the affected goods are expressed in so-called Harmonized Tariff Schedule (HST) codes, which may only be found in the US data. The amounts (in US dollars) have been converted to euros. It should be noted that not all these goods are affected equally. Aircraft, for example, are subject to a 10 percent surcharge, while all other goods carry a 25 percent tariff. On the other hand, this is not to say (by definition) that aircraft are affected less severely per euro of exports than other exports .