deletions | additions       diff --git a/bibliography/biblio.bib b/bibliography/biblio.bib  index 2b3a451..43467d0 100644  --- a/bibliography/biblio.bib  +++ b/bibliography/biblio.bib 
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}  @article{Mendelsohn_1994,  doi = {10.4337/9781843761440.00011},  url = {http://dx.doi.org/10.4337/9781843761440.00011},  year = {1994},  }  @article{a827bf,  author = {Mendelsohn, Robert and Nordhaus, William D and Shaw, Daigee},