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GDP is a measure of output, not welfare. Or, HOS meets the SNA

Nicholas Outlon ()
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Nicholas Outlon: Centre for Macroeconomics (CFM)

Authors registered in the RePEc Author Service: Nicholas Oulton ()

No 1906, Discussion Papers from Centre for Macroeconomics (CFM)

Abstract: What effect, if any, do changes in the terms of trade have on the level of output (GDP) or welfare? I examine this issue through two versions of a textbook, Hecksher-Ohlin-Samuelson (HOS), two-good model of a small, open economy. In the first version both goods are for final consumption. In the second, one good is an imported intermediate input into the other. In both versions, economic theory suggests that an improvement in the terms of trade raises welfare (consumption) but leaves aggregate output (GDP) unchanged. This follows from a continuous-time analysis using Divisia index numbers. I then show that a national income accountant applying the principles of the 2008 System of National Accounts (SNA) would reach the same conclusions.

Keywords: GDP; Welfare; SNA; Hecksher-Ohlin-Samuelson; Terms of trade; Divisia (search for similar items in EconPapers)
JEL-codes: E01 F11 C43 D60 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-int and nep-mac
Date: 2019-03
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