The
number of potential bond upgrades remained at 339 as
of March 26, 2018, with the metals, mining, and steel sector leading in positive
bias.
Personally, based on the lack
of numbers of cases for comparison, lack
of discussion
of limitations and
potential bias I would conclude very little from this study.
The IPCC range, on the other hand, encompasses the overall uncertainty across a very large
number of studies, using different methods all with their own
potential biases and problems (e.g., resulting from
biases in proxy data used as constraints on past temperature changes, etc.) There is a
number of single studies on climate sensitivity that have statistical uncertainties as small as Cox et al., yet different best estimates — some higher than the classic 3 °C, some lower.