“…To this purpose, they estimated the impacts by using gravity models (Frankel, ; Micco et al., ; Rose, ) and controlled for changes in variables, such as gross domestic product (GDP) per capita, relative prices and other relevant determinants of bilateral flows. When country or year‐specific effects of the euro were estimated through gravity equations, it emerged that the direct effect on intra‐European Monetary Union (EMU) flows has been generally positive; in some cases and periods, it was negative or insignificant (Camarero et al., ; Herwartz & Weber, ; Santana‐Gallego, Ledesma‐Rodrìguez, & Pérez‐Rodrìguez, ). The presence of heterogeneous effects between countries has raised issues related to the conclusiveness of the findings, as a negative sign of the partial/direct effect is difficult to justify.…”