The paper investigates the nature and extent of regional collective learnin
g processes and networking by innovative, technology based, small and mediu
m sized enterprises (SMEs) in the Cambridge region. It highlights the impor
tance of socio-cultural preconditions for learning involving the University
of Cambridge, and documents the significance of firm spin-offs, inter-firm
and organization networking, and local scientific and managerial recruitme
nt, as dynamic collective learning processes. It also, however, identifies
the complementary importance of wider national and global networks for SME
innovation inputs, research collaboration and professional staff recruitmen
t. Finally, it assesses the relevance of the concept of 'institutional thic
kness' in evaluating firms' experience of regional support structures and s
ervices.