base period

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base pe·ri·od

(bās pēr'ē-ŏd)
12-month time duration divided into quarters.
References in periodicals archive ?
The reference period for an interview is the 4-month period preceding the interview month.
Because the Survey of Income and Program Participation information is collected for up to two businesses and up to two paid jobs in a reference period, the earnings data are aggregated over both businesses and both jobs.
d) (SP4) ( Applications by new entrant farmers during the reference period.
Societe Generale may not however sell shares during any reference period.
From the September quarter 2012, the ABS harmonised the index reference periods for the Consumer Price Index (CPI) series.
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