该论文在两部论文集中出现，不知是否有人能够找到。谢谢！

Title:Some Engel Curves
Authors: Gorman, W. M.; Blackorby, C.; Shorrocks, A. F.
Source: Separability and Aggregation, January 1996 , pp. 353-379(27)
Publisher: Oxford Scholarship Online Monographs
http://www.ingentaconnect.com/content/oso/609280/1996/00000001/00000001/art00022

来源二：
Title:Some Engel Curves
Authors: Gorman, W. M
Source：Essays in The Theory and Measurement of Consumer Behaviour, Angus Deaton (ed.) (Cambridge, UK: Cambridge University Press, 1981).