Scale and scope economies of Australian permanent building societies in a dynamic framework

In this paper we examine the interrelationship between technological change, branching, and the multi-product cost structure of Australian Permanent Building Societies within a dynamic specification of the cost function. The results strongly support this dynamic formulation, though the speed of adjustment of costs to long-run levels is quite fast. We also find evidence of economies of scale for small societies, suggesting some potential for smaller societies to benefit from increased scale through mergers.