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  1. 1. The Value and Use of Secondary Data Amy Pienta ICPSR
  2. 2. Why use secondary data? <ul><li>Kuhn’s (1970) scientific paradigm </li></ul><ul><ul><li>Replication and confirmation of results </li></ul></ul><ul><ul><li>The foundation of the scientific process is that research should build on previous work, </li></ul></ul><ul><li>Sharing data and allowing for replication makes one’s work more likely to be taken seriously and cited more frequently (King et al., 1995). </li></ul>
  3. 3. Why use secondary data? <ul><li>The nature of large datasets virtually guarantees that a single researcher or group of researchers will not be able to use the dataset to its full potential for a single project. </li></ul><ul><li>Utilizing secondary data ensures that resources spent on data collection are put to the best use possible and the public benefit is enhanced. </li></ul><ul><li>Great value for students, postdocs, junior faculty (and others) </li></ul>
  4. 4. Secondary Data and Graduate Students <ul><li>Why graduate students use secondary data </li></ul><ul><li>Why graduate instructors use secondary data in classroom </li></ul><ul><li>ICPSR disclaimer </li></ul>
  5. 5. Graduate Students Users of Secondary Data at ICPSR User Affiliations Spring 2005 2005 %s Spring 2007 2007 %s Undergraduate Student 6535 25.8% 27791 29.1% Graduate Student 10175 40.1% 34023 35.6% University/College Faculty 4111 16.2% 15602 16.3% University/College Staff Member 1113 4.4% 4045 4.2% Research Organization 840 3.3% 3336 3.5% Federal Government 341 1.3% 1167 1.2% Local Government 295 1.2% 1003 1.0% State Government 245 1.0% 966 1.0% News Organization 100 0.4% 408 0.4% Treatment Service Provider 118 0.5% 354 0.4% Other 1492 5.9% 6876 7.2% TOTALS 25365 95571
  6. 6. Common Uses of Secondary Data <ul><li>Class Assignments </li></ul><ul><li>Class Papers </li></ul><ul><ul><li>Replication </li></ul></ul><ul><ul><li>Original Analyses </li></ul></ul><ul><li>Student Presentations and Publications </li></ul><ul><ul><li>Sole author </li></ul></ul><ul><ul><li>Co-authored with faculty </li></ul></ul><ul><ul><li>Co-authored with students </li></ul></ul><ul><li>Theses and Dissertations </li></ul>
  7. 7. Replication Publication <ul><ul><li>A replication study is a valuable way to meet the goals of a graduate course (Gary King, 2006) </li></ul></ul><ul><ul><ul><li>get published </li></ul></ul></ul><ul><ul><ul><li>help professionalize students into the discipline </li></ul></ul></ul><ul><ul><ul><li>teach the scientific norms of the free exchange of academic information. </li></ul></ul></ul>
  8. 8. <ul><ul><li>Elements of a replication paper (King 2006) </li></ul></ul><ul><ul><ul><li>Address a substantive problem in your field of interest </li></ul></ul></ul><ul><ul><ul><li>Begin by locating an article in your field, acquiring the data used in the article, and replicating the specific numerical results in the tables and/or figures in that analysis </li></ul></ul></ul><ul><ul><ul><li>Describe the extent to which you were able to replicate the author’s results </li></ul></ul></ul><ul><ul><ul><li>After replicating, try to improve the presentation of the original results. </li></ul></ul></ul><ul><ul><ul><li>Next, run some controlled methodological experiments designed to advance the state of knowledge about the substantive project. </li></ul></ul></ul>Replication Publication
  9. 19. Secondary Data at ICPSR <ul><li>Finding Data For Classes, Projects, Papers and Presentations </li></ul><ul><ul><li>Basic Search </li></ul></ul><ul><ul><li>Browsing the Collection </li></ul></ul>
  10. 25. Preview of Part II <ul><li>Paula Lantz – American’s Changing Lives </li></ul><ul><li>James McNally – National Archive on Computerized Data on Aging </li></ul><ul><li>Frank Stafford – Panel Study of Income Dynamics </li></ul><ul><li>Felicia LeClere – Minority Data Resource Center and Data Sharing for Demographic Research </li></ul>
  11. 26. Thank you… <ul><li>Amy Pienta </li></ul><ul><li>[email_address] </li></ul>
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