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( . acelero - )
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(. - propensity to consume /PC)
.
(. - average propensity to consume /APC) = C/Y ( C - , Y - ).
(. - marginal propensity to consume /MPC) - ΔC/ΔY, - , - .
(. - propensity to save /PS)
( ) .
(. - average propensity to save /APS) = S/Y, I/Y, S - ; I - ; Y - .
(. - marginal propensity to save /MPS) - - DS/DY, DI/DY, - (); - .
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