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common-base-year analysis
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common difference
com·mon dif·fer·ence (plural com·mon dif·fer·enc·es)


noun 
Definition:
 
difference between terms in arithmetic series: the difference between successive terms in an arithmetic series. For example, 3 is the common difference in the series 2, 5, 8, 11.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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