In less developed countries, upgrading production technologies by importing machinery is an important source of growth. Using new firm-level data from Hungary for the period 1992-2003, this column finds that firms are more likely to import a particular piece of sector-specific machinery when other local firms previously imported the same machine. A similar pattern holds regarding the choice of the machine’s source country. These benefits are concentrated in large and foreign-owned companies, while small and domestically owned firms may actually be adversely affected.