Qual Quant (2008) 42:809–820
Data editing and quality of daily diaries in the Italian
Time use survey
Salvatore F. Allegra · Barbara Baldazzi
Published online: 8 March 2007
© Springer Science+Business Media B.V. 2007
Abstract In the Italian Time use survey, carried out by Istat (Italian National
Statistical Institute) in 2002–2003, the coding process translates the sentences re-
ported by the respondents into codes, but association text-code is not a one to one
easy linkage, because the respondents describe the activities performed using the
common language. So, a process of data editing is requested in order to improve data
quality. The possibility to use sentences (recorded in the data entry) has deﬁnitely
improved the data editing process.
The main questions to analyse concern:
(a) particular ancillary codes used by coders to point out daily diary’s problems;
(b) incompatibility between codes and codes and between codes and text;
(c) errors in the intervals’ sequences.
This paper shows methodological and contextual choices in order to build the
process of data editing. In particular, it is focused on the analysis of techniques and
deterministic rules adopted and on the analysis of imputation system to correct ade-
quately the wrong codes, with reference to the entire diary.
Keywords Time use · Data editing · Sentences · Diary · Deterministic rules ·
This paper was presented at the XXVI IATUR (International Association for Time Use Research)
Conference held in Rome, 27–29 October 2004. The authors share contents and views expressed in
this paper. However, the paragraphs are so drafted: Salvatore F. Allegra drew up the paragraphs
1, 2, 3, 7; Barbara Baldazzi drew up the paragraphs 4, 5, 6, 8. Salvatore F. Allegra and Barbara
Baldazzi drew up the paragraph 9.
S. F. Allegra(
)· B. Baldazzi
Istat, Via Adolfo Ravà, 150, 00142 Roma, Italy