Transition economies, such as the countries in Southeast Europe, face an expeditious institutional transition from a centrally planned to a market economy. The state withdraws from its monitoring function, which results in institutional voids that affect the economy in general and small and medium sized enterprises (SMEs) in specific. With a qualitative case study approach Tine Schrammel develops a scheme to detect institutional voids as one source of competitive disadvantages of SMEs in transition economies. In a second step she demonstrates that specific cluster services bridge institutional voids and improve the competitive position of SMEs in environments of institutional voids. The findings add to the understanding