Pre-print, Working paper: Does the complexity of the ownership structure of multinational enterprises’ (MNEs) enable tax avoidance? We characterize as complex an MNE’s ownership structure in which the headquarter owns its subsidiaries through a chain of intermediaries and we build a measure defined as the mean number of layers between affiliates and the headquarter. We use firm-level cross-country data to show that affiliates belonging to more complex MNEs are more likely to report zero profit, which is consistent with complexity enabling tax avoidance by multinationals. Our results underline that only the more complex MNEs shift profits away from their high-tax affiliates, while MNEs with flat ownership structures do not display such pattern.