I need to quote something from an author.
... during an economic downturn, it is no easier to find a job in a region with lower prevailing unemployment than in one with a higher unemployment rate.
As you can see, the sentence is a bit awkward as it does not have a parallel structure. I am wondering if in my quotation, I can edit it without changing the meaning. Are the following additions acceptable? See the following edit.
"... during an economic downturn, it is no easier to find a job in a region with a lower prevailing unemployment rate than in one with a higher prevailing unemployment rate."
Mine has a parallel structure. My guide, the Chicago Manual of Style does not say anything about putting in such words to improve clarity. It does however allow changing spelling, punctuation, and capitalization.