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Related Experiment Videos

Policy evaluation research. Measuring the independent variables.

C LaFond1, T L Toomey, C Rothstein

  • 1University of Minnesota, USA.

Evaluation Review
|April 5, 2000
PubMed
Summary

This study evaluated three methods for collecting policy data. Historical legal research is accurate for established laws, but recent or inconsistent laws require multistage data collection for reliable policy change information.

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Area of Science:

  • Policy analysis
  • Legal studies
  • Government research

Background:

  • Accurate policy data is crucial for understanding legislative trends.
  • Existing methods for policy data collection vary in their reliability.
  • Evaluating data collection accuracy is essential for research integrity.

Purpose of the Study:

  • To assess the accuracy of government agency surveys, secondary sources, and historical legal research for policy data.
  • To identify the strengths and weaknesses of each data collection method.
  • To determine the best approach for tracking policy changes over time.

Main Methods:

  • Conducted historical legal research on law changes in 48 contiguous states from 1968 to 1994.
  • Compared the accuracy of legal research against government surveys and secondary sources.

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  • Analyzed the impact of law establishment, adoption rates, and legal consistency on data accuracy.

    • Main Results:

    • Historical legal research proved highly accurate for well-established laws with consistent legal descriptions across states.
    • Recently enacted laws, those adopted by few states, or those with inconsistent legal treatment posed challenges for accurate data collection.
    • A multistage data collection method is necessary for reliably identifying policy changes in complex legal landscapes.

    Conclusions:

    • The accuracy of policy data collection methods is dependent on the nature of the laws being studied.
    • For well-established and consistent laws, historical legal research is a reliable method.
    • Emerging or inconsistent policies necessitate advanced, multistage data collection strategies for precision.