Look for Vistesen's work

A propósito de "Vendas a retalho caem inesperadamente na Alemanha" talvez valha a pena acompanhar o trabalho, a tese de doutoramento, de Claus Vistesen sobre o efeito da demografia, neste caso do envelhecimento de uma sociedade, nos seus padrões de consumo.
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Há dias, ao almoçar com um jovem alemão disse-lhe: É fácil perceber que uma série que passa na televisão é alemã, mesmo sem som. Basta olhar para a idade média dos actores.
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"Growth Theory and Demographics"
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"Ageing leads to a decline in domestic demand and in a closed economy there is really not a lot you can do; savings/investment will fall and consumption will be lacklustre since there is no underlying dynamic to feed it other than dissaving. However, in an open economy you can fight this through claims on other economies or put in another way, you can save more than merited by domestic demand and thus you can invest your savings abroad. Note here that technically this is exactly what e.g. Germany and Japan are doing in the sense that their excess savings have to be matched by excess borrowing/investment demand elsewhere." (Trecho retirado daqui)