Savings and investment in Australia

It has become popular to advocate tax reduction on the basis of promoting savings, investment and ultimately economic growth. The linkage between the variables is argued by various neoclassical growth models and is further suggested by recent studies which highlight the close association between domestic saving and investment rates. The close association may allow for polices which alter domestic saving levels in order to alter domestic investment levels. This interpretation, however, presumes an endogenous investment response. Equally likely, theoretically, is that the close association is maintained by movements in national savings. The present paper explicitly examines the endogeneity of the Australian saving and investment rates. The results highlight the exogeneity of investment. The results further suggest an endogenous response on the part of Australia's saving rate. The results may limit the potential benefits of these tax changes.