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What is correct in writing the following:

"Total imports in the US grew 5.82% CAGR from 2010-2012 and later declined to -1.18% CAGR from 2013-2016."

  • Nothing terribly wrong with what you have, though I'd tend to say "...grew at a 5.82% CAGR...". – Hot Licks May 4 '17 at 2:03
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    Quibble. A series of CAGRs is discontinuous, not smooth. I've never liked seeing trending words used with a list of annualized metrics such as CAGR. I'd word it differently to stay away from grew (it's already in CAGR). Declined is also confusing. In normal usage, it implies a smooth downward trend. A series of annualized rates doesn't decline. You could use fell or dropped. Many would use slid, but again, its a trend word and a series of annualized rates don't slide, slip, or skid; they bounce, jump, flip-flop, etc. The rates were 5.82% and -1.18% for 2010-2012 and 2013-2016. – Phil Sweet May 4 '17 at 3:25
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    I would question "declined to -1.18%". It's like a double negative. It's declining at a rate of -N%? The beginning and end-points of the periods are also unclear. – Xanne May 4 '17 at 6:35
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    Declined to -1.18% means that the total value of imports actually reduced to 98.82% of the value at the start of the period rather than that the growth slowed so that the value at the end of the period was 101.18% of the value at the start. Either could be correct but the second seems more likely. It's like the difference between a reduction in positive inflation where price rises slow down and negative inflation where prices actually fall. Which do you mean? – BoldBen May 4 '17 at 7:01
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    @mahmudkoya - As the confusion of the other commentators illustrates, the main problem is that rates are being discussed, and hence any discussion of rising or falling (whatever term is used) has another factor involved (time) which is not made clear. This would not be a problem if the audience is folks familiar with such terminology (and "CAGR" in particular), but is a problem for the "general public". – Hot Licks May 4 '17 at 11:30

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