They allow assessing the implications of higher levels of medical-care spending and higher governmental health expenditures on economic growth, and identify what are the long-run determinants of medical spending growth. For example, a CGE model could be used to estimate the extent to w'hich increases in medical spending are driven by capital investment in health technologies. The CMS Dynamic Computable General Equilibrium Model represents the U.S. economy as being composed of two markets, health and non-health products, for which aggregate demand and supply are modelled (see annex 1.21).