We analyse the impact of relaxing rules of origin (ROOs) in a simple setting with heterogeneous firms that buy intermediate inputs from domestic and foreign sources. In particular, we consider the impact of switching from bilateral to diagonal cumulation when using preferences (instead of paying...

World trade volume is in retreat for the first time in more than two decades and the contraction is on a scale not seen since the global recession following the second oil shock of 1979-1980. The United States (US) is at the epicenter of the crisis and is a major source of external demand for...