Top destinations in us for One way of explaining why this is the case may be to visit the process used in market economies for the production of capital (such as machinery and equipment). The neoclassical model teaches us that capital in the future is equal to the existing stock of capital (net of depreciation) plus present investment. That is, capital accumulation depends crucially on the level of investment in the economy. But investment is the result of, among other things, saving. Most of our saving (such as in the form of demand deposits etc.), is used by firms in investment projects. So there is a direct link connecting saving to investment and another one connecting investment to capital. Top destinations in us 2016.