The Design of Time-Series Comparisons Under Resource Constraints

Thomas R. Willemain and Nelson S. Hartunian
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Thomas R. Willemain: Harvard University
Nelson S. Hartunian: Smart, Hartunian, and Willemain, Inc.

Evaluation Review, 1982, vol. 6, issue 4, 537-557

Abstract: We compare two methods for dividing an interrupted time-series study between baseline and experimental phases when study resources are limited. In fixed designs the baseline duration is chosen before the baseline begins. In flexible designs the baseline duration is not predetermined but made contingent on remaining resources and the degree to which the results match the prior expectations of the evaluator. Flexible designs are much pre ferred when the evaluator's priors are of good quality.

Date: 1982
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Persistent link: https://EconPapers.repec.org/RePEc:sae:evarev:v:6:y:1982:i:4:p:537-557

DOI: 10.1177/0193841X8200600405

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