Giannelli, Gianna
Braschi, Cristina
In recent years the question of overtime work has become increasingly relevant as part of
the wider issue of the reduction in the working day. A direct relation between policies aiming
at reducing working hours, and increases in overtime work neutralising their beneficial effects
on employment, has been envisaged by those opposing such policies.
We investigate this issue using microdata by the Bank of Italy. In Italy, the incidence of
overtime work among male dependent workers is relatively high. In particular, we seek to
ascertain if, for Italy too, the fear that a reduction in working hours could give rise to a
substitution of overtime work for new jobs is legitimate.
We estimate the probability of working overtime, together with equations for overtime hours
of work, using different econometric models, both for cross-section (probit, tobit) and panel
data (conditional fixed effects logit). Among several other variables, we control for wages and
normal hours. We are particularly interested in exploring differences by sex. Overtime has
always been studied over selected samples of male employees working in the private sector.
Of course, focusing on workers who are most likely to work overtime will yield the result of a
relatively large �substitution� effect. We show that extending the analysis to a more realistic
labour market that includes female workers, this effect may become relatively modest for
some specific policy measures. This result is robust across different sampling assumptions
and model specifications, thus giving support to the hypothesis that the policies aiming at
reducing the normal working day may have positive employment effects.
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