A
second
one
is
the
expansion
of
economies
and
businesses
globally,
thus
increasing
the
need
for
larger
workforces.
A
third
is
that
the
compensation
levels
of
these
workforces
vary
dramatically
across
countries,
even
for
comparably
skilled
work-
ers.
The
fourth
reason
is,
and
following
from
the
previous
three,
is
that
firms
see
that
they
are
able
to
gain
and
sustain
a
global