L. Regional innovation systems in Hungary: the failing synergy at the national level, Regional Studies. Entropy statistics are used in this paper to measure the synergies of knowledge exploration, knowledge exploitation, and organizational control in the Hungarian innovation system. The data consist of high- and medium-technology firms and knowledge-intensive services categorized by subregions (proxy for geography), industrial sectors (proxy for technology), and firm size (proxy for organization). Configurational information along these three dimensions is used as an indicator of a reduction of uncertainty or, in other words, the synergy across the knowledge functions. The results indicate that three regimes have been created during the Hungarian transition with very different dynamics: (1) Budapest and its agglomeration emerge as a knowledge-based innovation system on every indicator; (2)the north-western part of the country, where foreign-owned companies have induced a shift in knowledge-organization; while (3) the system in the eastern and southern parts of the country seems to be organized as a response to government expenditure. The national level no longer adds to the synergy across these regional innovation systems.