ECON10003 Lecture Notes - Lecture 4: Autarky, Diminishing Returns, Retained Earnings

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Reasons for saving: different incentives, lifecycle saving borrow money when income is low and save money when income is relatively high. If real interest rate increases, opportunity cost of consumption will increase, thus consumption will fall and consumption will rise: demographics the age structure is important, e. g. Japan, with aging population, they elderly are at a different stage of their life, thus more savings less consumption: related to lifecycle concept, beliefs about future events, behavioural economics: temptation and self-control, compulsory superannuation. National savings: other sectors of the economy can save, firms revenue less wages, other costs and dividends, retained earnings, government taxation revenue less expenditure, budget deficit or surplus. National savings in an open economy: can analyse an open economy (cid:1851)=++(cid:1833)+(cid:4666)(cid:1850) (cid:4667) (cid:1851) (cid:1833)=+(cid:4666)(cid:1850) (cid:4667) (cid:1845) =(cid:1850) , this is an identity always true, result: in an open economy saving less investment equal exports less imports.

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