VIA NOMENTANA, 41 - 00161 ROMA - TEL. 86.27.80 - 86.80.54 
UNIVERSITA DEGLI STUDI Dl ROMA 
FACOLTA Dl SCIENZE STATISTICS DEMOGRAFICHE E ATTUARIALI 
ISTITUTO Dl ECONOMIA 
Roma, 29/1/1 985 
Dear J osef, 
thank you for your letter. My objection to the 
beginning of your paper was only that you gave 
the impression of considering measurement and 
aggregation as Sraffa's only (or main) aim or 
concern; while I think he had other main aims 
(to criticize the neoclassical approach^ atad to 
reestablish the classical one) for which 
measurement and aggregation were instrumental. 
Of course Sraffa's analysis has then many 
implications, and can be used for many purposes. 
More thank that, cettain problems (employment, 
market forms, etc.) require different kinds 
or 'levels' of analysis; consistency in concepts 
and 'vision' is required, but not necessarisly 
strictly formal consistency. I don't think this 
implies any disagreement with the object or the 
substance of your paper. 
Ceriani and I look forward to the revised version 
of your Trieste paper on structure. I am progeeding 
slowly with my paper for the Sraffa conference. 
The administrative troubles take away large 
amounts of time; I was elected director of the 
department, against my wishes, and I will be free 
to resign only in October. Jan was in Rome in 
the past week-end: it seems that the Trieste 
school will be repeated this year as well, lasting 
a week, immediately after the Sraffa conference. 
I am glad that we will aiso meet in Berlin in 
October.