While verb phrase ellipsis (VPE) is well-studied theoretically and
psycholinguistically, it remains unclear why speakers use ellipsis at
all. We present an acceptability rating and a self-paced reading study
that show that the uniform information density hypothesis (Jaeger & Levy
2007) is adequate to explain encoding preferences: By using VPE speakers
avoid troughs in the information density profile. They are the more
likely to use a VPE instead of the corresponding redundant full form the
longer this full form would be. This is reflected in degraded ratings
and faster readings times for the longer full forms.