Enterprise Clusters and Networks in Developing Countries analyses the functions and advantages of clusters and networks for small enterprises in developing countries.In the opening chapter the editors describe different types of clusters and networks and compare the diverse forms of external economies and co-operation effects derived from them. Taking a multidiscplinary approach, they point out it is trust that is the social basis for positive effects of clustering and networking, which are often sources of co-operation and technology diffusion for small enterprises in developing countries.