We study preferential attachment (i.e., a rich‐get‐richer effect) in alliance networks. Thereby, we argue that various levels (firm, firm group, country) influence the strength of preferential attachment. To test our hypotheses, we take a sample of 117 airlines from 74 countries in the period 2001 to 2011. For the estimation, we use stochastic actor‐oriented models, a method for analyzing longitudinal network data. As a result, we find that preferential attachment is stronger for firms that have fewer resources and are located in a less‐developed country. Consequently, we show how different competitive positions affect alliance strategies.