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Data Services Knowledge Base: Reference Questions

  1. The PSID is not based on a simple random sample. What variables should I use for complex sample survey variance estimation?
  2. How does one handle weights in a longitudinal analysis with differential sample attrition over time, etc? I am using selected years in the NLSY.
  3. I’m interested in putting in two small grant proposals over the next few weeks – and both will be completely secondary data analysis – one of the data sets (MIDUS) is available through ICPSR and the other is the Wisconsin Longitudinal Study, which is publicly available. What is the UM policy on public use data and IRBs?
  4. Has anyone gotten clearance for the American's Changing Lives study, currently PI'd by Michigan researchers Jim House and Paula Lantz? We use the data because it's in-house, but if I wanted to put it in an R03 for October, would I need to go through IRB for approval?
  5. Where can I find out the change in the distribution of religious denominations over time?
  6. I need to know if there is a good source to look up 2000 PUMA geography via maps or lists. I need to get an idea of how different metros and counties line up with PUMAs.
  7. I am looking for the total number of births (no rates), 1975-present, by state. I need for this to be in electronic form if possible.
  8. I am having trouble reading a file into SAS. SAS is complaining about the last variable in each record. If I look at it with an editor, it looks like a ^M.
  9. I am looking for estimates of the size of the 15-44 year old female population by state for a far back as I can get it. I am trying to construct fertility rates and have births back to 1930. Even if I can not get them back to 1930, getting them back to the late 1940s would be very helpful.
  10. I am trying to some mortality data for the state of Michigan and Montcalm county, Michigan from 1960 to present. We’d prefer age-adjusted figures over age-specific. Do you have any thoughts on how best to obtain these data? This is for a health disparities documentary and the data are needed immediately.
  11. I downloaded a US Census Extract recently and have been running some descriptive statistics. In terms of race, Brazilian median household income immigrants mostly identify as white, "some other race" and "two or more races". I would like to find out how they classified in the latter 2 categories. Is there any way I can do this? Also, if it is just a matter of creating an extract with specific variables (e.g. "OTHER", NUMRACE), would it be possible to add these variables to my existing dataset? Or would I need to do a completely new data extract with all of the variables?
  12. I was looking at the variables in the Collaborative Psychiatric Epidemiology Surveys (CPES) and I need to know how pregnant women are identified in the surveys. Also, how many pregnant women are in the samples?
  13. I am working with NELS data (base year, first follow-up and second follow-up). When I tried to extract the variables from raw data using the SAS setup cards provided by ICPSR, I do not get the right number of cases – way too few.
  14. I am doing an analysis with the PSID and I need a very simple variable – race. Where is the race variable?
  15. I would like to get a copy of the Census 1990 elderly households 8% sample dataset and codebook. Please let me know if it is available and the procedure for obtaining it.
  16. How do I read SAS export files?
  17. I want to compare the mobility of siblings in the PSID. How can I find siblings considering they no longer live in their family of origin?
  18. Do you know if the 1960 census asks the same ‘where did you live 5 years ago’ question that was asked in 1970-2000?
  19. The PSID changed their sample in 1997 - reduced the number of original families that are included in the survey. How does this affect the weights?
  20. I am having trouble measuring density for zip codes. I have pulled off land area and population size from the national SF1 file, but the results I'm getting are way too small.
  21. I would like to deposit data from our research project with ICPSR. Any guidance you can give me would be appreciated.
  22. I need data from several years of the March Current Population Survey but notice that these data do not have set-up files associated with them.
  23. I need national data from Summary File 3 from the 2000 Census. I need data at the county, census tract, and block level – summary levels 40, 140, and 150). This looks like a lot of files to download for just these summary levels. Is there a better solution?
  24. I have a zip code file that has all zip codes in the nation that I am merging to a person file. When I look at the merged file I see that there is no zip code information for the respondents who live in zip code 48103, which is a valid zip code. Why didn’t the merge work?
  25. I am using microdata from the 2000 Census of Population and Housing. I have found some families with a code of "0" on family income. Is this an error on the part of the Census Bureau? If not, what is the explanation?
  26. Can I access data from ICPSR from my home PC? My home computer is not part of the university IP pool.
  27. I am looking at the life history calendar for the Chitwan Valley (Nepal) study data. The total number of observations listed is 5,271, but there are only 1,469 observations in the life history data. What is the solution?
  28. ICPSR used to have a FastTrack service where some data were released fairly immediately – before normal ICPSR processing. I cannot seem to find this anymore.
  29. I am generating some age-specific counts for various neighborhoods to compare with data in the Research Data Center (RDC). However, I am having trouble getting these counts to agree with what previous workers on this project have generated. Can you take a look at my numbers vs the project counts for our neighborhoods?
  30. I am interested to public use microdata from the Survey of Consumers. I would like it for as many years as possible. I do not know if the producers readily give this out but I know of researchers who have access to the data.
  31. The Pew Hispanic Center put out a report last November with Race, age and citizenship status info from the September 2007 CPS. (See table below from report): [http://pewhispanic.org/files/reports/83.pdf](http://pewhispanic.org/files/reports/83.pdf) I didn’t know you could get race info from anything other than the March CPS. What do you know about race information available for other months?
  32. I am trying to get a sense of the American Community Survey (ACS). It is harder than I would have thought. Am I correct in thinking that annually they survey approximately 3,000K households per year? Are the samples independent of each other - e.g., 2005 and 2006? Finally, they do not seem to ask about country of birth. This seems odd although you might be able to make an estimate with ancestry and citizenship.
  33. We would like access to the original Indianapolis Fertility Survey (1941). Does PSC have these data?
  34. The codebook for the 1972-2006 GSS does not agree with the data. The weight variables are noted as being in columns 6982-6993 and yet the data only goes to column 6801.
  35. Can you help me find a public-use codebook for Baccalaureate and Beyond (B&B)and the National Education Longitudinal Study (NELS)?
  36. How does one get access to the Baccalaureate and Beyond data (public-use)?
  37. How is the residence of prisoners noted on death certificates - the prison or the original home address? What about other institutional populations (dorms, hospitals, etc.)?
  38. I need to know what the boundaries of metropolitan areas were at the time of the 2000 census. How are metropolitan areas defined? As an example, I need to know Albuquerque, New Mexico, Atlantic-Cape May, New Jersey, and Chicago, Illinois.
  39. I am looking for some software that can take an address on a single line with perhaps an error in the street name and return a corrected address with a zip code. For instance: 1501 Washtenaw Ann Arbor, MI would be corrected to: 1501 Washtenaw Ann Arbor, MI 48104-3179
  40. I am using the "Immigrants Admitted to the US" files and would like to compare my results with the statistical yearbooks that the Immigration and Naturalization service produced. I'm not finding these on the INS website.
  41. I need an indicator of rurality for zip codes. Are you aware of something I could use?
  42. What’s the difference between a PMSA and an MSA?
  43. Where can a user find GIS information concerning HIV rates?
  44. I need to know some characteristics of the Korean population in the United States. Is there a search term I can use to find information or do I have to come in and learn how to use the data?
  45. Does PSID have a value of car variable for the time period 1987-1997?
  46. Where can I look at a map of census tracts for Manhattan? I am interested in the area above 110th street.
  47. The 2007 ACS data were released today. How long will it take for us to get the microdata?
  48. I am using some data from Mexico. The questionnaire is in Spanish and there is no English translation of it. I need some help with getting this document translated.
  49. I downloaded the separate Cape Area Study Panel Waves 1-2-3 Household and Waves 1-2-3 Young Adult data and now I would like to merge them. How do I do that?
  50. Do you know of a source for segregation indices that cover the 1970 to 2000 time period? I want this to be for metropolitan areas and for the measure to be a white vs black index.
  51. I am trying to work with the Early Childhood Longitudinal Survey Kindergarten cohort data or some other data that will allow me to look at the impact of school year length (especially long school year calendars) on student achievement. Do you know of any other sources of education data?
  52. I am trying to find a table in an old Current Population report. It is pretty tedious going through all the reports by hand. Is there a logic to these reports?
  53. Do you know of a free source for historical election returns by counties, e.g., 1972, 1976, etc.
  54. I have an excel file that I want to join to an Arcmap template. My file has a 'previous sample' column that has 1 and 0 values in it. Every time I try to do the join the 'previous sample' variable is not listing in my attributes table. What is going on?
  55. What is the difference in the standard occupational classification system over time?
  56. What does data defined person mean? It is an item in the microdata for 2000.
  57. I have an international collaborator and need to include the Federal Wide Assurance (FWA) for his institution. He does not know whether his institution has this or not. What do you suggest?
  58. Does anyone know if the Guatemalan national surveys data are freely available, or have experience acquiring this data? The Guatemalan government seems to make only the most recent year's available online.
  59. Do you have a source for the number of undocumented migrants by state from 2000 on?
  60. Can you help me find the University of Michigan Inflation Expectation Survey?
  61. I am publishing an article based on the public use NLS79 file. Do these data need to be acknowledged like the restricted data?
  62. Can you help me with historical data on rates of homicide and aggravated assault for the 1940s and 1950s for large American cities?
  63. I just downloaded the 2010 shape file for counties. When I open it the water bodies around Michigan are covered like land masses. How do I get the Great Lakes to appear as water?
  64. I need access my family's response to the 1950 Census for proof of age. Can you help me?
  65. I have funny results for the distribution of education using 1950 IPUMS data. What am I doing wrong?