is provided in the lexicon and used in morphology and phonology
for the realization of the cliticized verb form. Differently for
what concerns the clitic ``loro''; I will show that this element
exhibits word like properties and I will consider it a lexical item.
In this way, it will be possible to account for the differences in
distribution between monosyllabic clitics and ``loro'' while being
able to derive the common properties.
Italian clitics, both monosyllabic clitics and ``loro'', can undergo
``clitic climbing'', namely they can appear on a verbal head of
which they are not an argument, if certain verbs are present. I will
propose a lexical analysis of this construction, cast within the HPSG
framework, which is based on the idea of ``argument composition'',
according to which the subcategorization requirements of the embedded
verb are passed up to the clitic climbing trigger verb. I will show
that the affix vs. word distinction proposed for monosyllabic clitics
and ``loro'', respectively, interacts in the desired way with
the argument composition analysis, accounting in an appropriate way
for the similarities and differences of these clitics with respect
to climbing.