The Econometric SocietyEconometrica: Jul 1936, Volume 4, Issue 3
A Study of Costs
https://doi.org/0012-9682(193607)4:3<226:ASOC>2.0.CO;2-Z
p.
226-241
Richard Stone, W. A. Tweddle
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p.
226-241
Richard Stone, W. A. Tweddle