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TIME‐VARYING PARAMETER ESTIMATION AS EXPLORATION *
Author(s) -
Erickson Gary M.
Publication year - 1981
Publication title -
decision sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.238
H-Index - 108
eISSN - 1540-5915
pISSN - 0011-7315
DOI - 10.1111/j.1540-5915.1981.tb00095.x
Subject(s) - estimation , variation (astronomy) , computer science , econometrics , statistical analysis , statistics , operations research , data mining , mathematics , economics , physics , management , astrophysics
A sequential time‐variation method is utilized in an attempt to detect changes over time in the effectiveness of market communication for an ethical drug. Sudden changes are indicated at three different points in time, and two of these are confirmed by subsequent analysis and information. Gradual changes are also indicated, but these are not confirmed by market information or statistical analysis.