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Derive the relation between savings, domestic investment, and net capital outflow using the national income accounting identity.
On May 09, 2024
Start from the national income accounting identity,
(1) Y = C + I + G + NX.
Recall from Chapter 25 that national saving is the income that is left after paying for current consumption and government expenditure,
(2) S = Y - C - G.
Rearranging, (1) we obtain Y - C - G = I + NX, and substituting in (2)
(3) S = I + NX.
Because net exports also equal net capital outflow, we can also write this equation as
(4) S = I + NCO.