That is an odd introduction for an academic paper:
On February 6, 2017, President Trump stated that media neglect to report some terrorist attacks.4
His administration released a list of purportedly underreported attacks.
I don't understand the end of the sample set:
On average, each of the 136 terrorism incidents was covered in 26 news articles. However,
the distribution is highly skewed. Over one quarter of the incidents received no coverage from the
sources that we searched while other attacks received disproportionate coverage. In the present
dataset, Muslims perpetrated 12.5% of the attacks yet received 50.4% of the news coverage. The
perpetrator was arrested in about half (47.1%) of the incidents. Attacks targeted law enforcement
or government 20.6% of the time. On average, less than one person was killed per attack, though
this again is highly skewed with the vast majority of attacks (81.6%) having no fatalities.
81.6% have no fatalities? The sample set seems pretty thin to work with, considering we're talking about 136 to start. Table A2 shows average fatalities to be 0.7 - that's a pretty weak average terror incident.
I'd look for that myself, but GTD (University of Maryland) which was used for the study does not make their dataset public.
I'm not saying the premise isn't true, I covered it in an earlier thread "Hoping for a Muslim". The paper just isn't terribly compelling and there's a lot of editorializing in it. It reads more like something a think tank would put out to support policy.