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August 15, 1974
Mr. Felix Paukert,
B«I«T.,
CE 1211 Geneva 22
Zwitserland

Dear Mr. Paiikert,
Thank you for your last letters and the reports. I read
them although some of them more intensively than others and my
general impression is yeiy favourable.
I enclose some comments that canieup upon reading three of
them. As you will see they are of secondary importance only, except
that some further data if available might be of considerable help
to our further work.

Yours sincerely,

J. Tinbergen

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Annex to letter to i'ïr. F. Paukert,

August 15, 1974

BIT, Geneva

Questions on W. van Ginneken; Mexioan Income Distribution within and
between ïural and Urban Areas WEP 2-23
Page 12/13

What is source of infoimation of "adjusted income"?

Page 32

Did you also study Professor B. van Praag's scale of
household members derived from his survey of 30CX)
consumers? (Economisch Instituut, Groenhovenstraat 5,
Leiden).

Page 35

What are the advantages of Theil's measure of inequality?

Page 42

Very useful remarks and table.

Page 91

Is a decomposition of urban households into some occupational
groups possible? This might help to explain income inequality.
Preferably also mention upper quartile and median years of
schooling for each occupation - and choose them so as to show
a minimum of dispersion within occupational groups.

Questions sur la publication de M.M. Lecaillon et Germidis sur Les disparites
de revenues entre travailleurs ruraux et salaries urbains dans le dynamique
de developpement.
Pourrait-on ajouter une table des matieres?
Est-ce que les montants du Tableau II-I (p. 30), du
Tableau II.N (p. 41) et du Tableau II.AE (p. 7?) sont en francs courants?
Si tel est le cas, est-il possible de les diviser par un indice du cout
de la vie?

Questions on J. Gaudes Capital-labour substitution possibilities: a review
of empirical research, WEP 2-22
Page 5

"Verdooh " mean to be "Verdoorn"?

Page 10

Do you agree with my remark ( ZS, f. Nat ok., 33 (1973) p. 226)
that Griliches and Ringstad wrongly summarize their own
findings on y^by saying that it is close to 1 for most

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and in 6 cases."''' > 0.8.
ï'9'ge 18

Could you explain why 1^ a O is equivalent to a "constant
rate of market imperfection??

Page 20

Could you indicate in Table 20 what the numbers in the
second column mean? Industry numbers?

Page 45

Wouldn't it be useful to add, on p. 46, something on
Leontief's suggestion that a worker in one country is not
the same factor of production as a worker in another country?
(Without necessarily adhering to his suggestion that one
American worker is equivalent to 3 foreign workers).

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