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Dissemination

Dissemination. Michael J. Levin Harvard Center for Population and Development Studies Michael.levin@yahoo.com. Dissemination topics. Flow Types Media. I.Flow of Dissemination. First releases – within one month of the census First level geography tables Detailed tables – geography

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Dissemination

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  1. Dissemination Michael J. Levin Harvard Center for Population and Development Studies Michael.levin@yahoo.com

  2. Dissemination topics • Flow • Types • Media

  3. I.Flow of Dissemination • First releases – within one month of the census • First level geography tables • Detailed tables – geography • Detailed tables – cross-tabulations • First analytical report • Subsequent analytical reports • PUMS

  4. II. Types of Dissemination • Frequencies (alone and by geography) • First-level cross-tabulations • Detailed cross-tabulations • Graphs * • Maps * • Indicators * • Results of direct and indirect techniques * • Other evaluation

  5. II-4. Population Pyramid

  6. II-4. Population Pyramid – two censuses

  7. II-4. Single Year of Age

  8. II-5. Maps

  9. II-6. Indicators: Age Reporting

  10. II-7. Own Children TFR estimates using Kenya Censuses: 1955-99

  11. II-7. TFRs by Wealth Quintiles, Kenya: 1975 to 1999

  12. II-7. TFR for Kenya, Tanzania and Uganda: 1985 to 2002

  13. II-7. TFR for Poorest, Kenya, Tanzania and Uganda: 1985 to 2002

  14. II-7. ASFRs for 5 year periods, Kenya: 1985-89 to 1995-99

  15. III. Media of dissemination • Paper • CD/DVD/Flash drives • Internet – already prepared tables • Internet – user developed tables on demand • Public Use Microdata Sets (PUMS)

  16. III-1. Paper • Traditional method – still important • But movement is away from paper to electronic media • Summary tables • Basic tables – geography for variables • Basic tables – crosstabs for two or more variables • Graphs, maps, other analytical tools • Detailed tables at low levels of geography • Detailed tables for small groups

  17. III-2. Compact disk/DVD/flash drives • For large tables • For low levels of geography • For selected variables – religion and ethnicity • For small groups – sensitivity issues • Direct dissemination -- watch confidentiality • Electronic media in office for use on request

  18. III-3. Internet dissemination • Tables downloaded directly from the web • Other forms of presentation stored – pyramids, graphs, maps, etc • Note: importance of media fitting on an A4 page

  19. III-4. Internet crosstabulations • Model is US Census Bureau’s American Factfinder • Computer makes takes described by the user – (1) geographic hierarchy, (2) columns, and (3) rows • Limited to those items available • Confidentiality is maintained • User cannot access micro-data • Next step: open use of micro-data online

  20. III-5. Public Use Micro-data Samples (PUMS) • Provides users opportunity to develop own tables • Provides users opportunity for statistical analysis • Provides users opportunity to test hypotheses • Does not provide detail for small groups and small areas • Consider size of one or more PUMS – 1 %, 5 %, 10 % or more • Consider confidentiality

  21. III-5. Disclosure Controls Example: Saint Lucia, 1991 Census • Restrict access to samples: 10% (13,405 persons) • Limit geographical detail (n<2,000): suppress region, district, town, settlement, enumeration district, school identification; retain urban-rural • Recode sparse categories (n<25) “other”. • Type of dwelling: suppress townhouse, barracks • Land occupation: suppress sharecrop • And others • Ethnic origin: suppress Chinese, Portuguese, Syrian-Lebanese • Religion: suppress 6 categories • School, work mode of transport: bicycle • Occupation, industry, training code: reduce from 4 digits to 1/2/3 • And others

  22. III-5. Technical Disclosure Controls Example: Saint Lucia, 1991 • Top-bottom code • Number of rooms: 10+ • Number of radios: 4+ • Age: 81+ • Age at first child: <= 14 • And others • Suppress: • date of birth, precise place of birth, type of work wanted • Migration: timing/place not identified in detail • Country last lived: suppress 37 categories • Year of immigration: <1948 • Identify place of residence by major civil division (pop>20k, 60k, 100k, 250k, 1 million—i.e., national convention) • all suppressed • Suppress any sensitive variable requested by NSI: • none (as yet)

  23. III-5. Implementing IPUMS technical protocols using CSPro – Design

  24. III-5. Design – Some Pop Items

  25. III-5. Demonstration of Concept:

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