Researchers FAQ

When will the results be available?

We expect to have all three waves of the data available in 2018.  Data for wave 1 are now available by request and plans are underway for public access elsewhere.

What is the sample design?

The sample is a longitudinal panel study with 3 waves, beginning in winter-spring 2015. It draws from a representative sample of 6 counties in the San Francisco Bay Area: San Francisco, Marin, Contra Costa, Alameda, Santa Clara and San Mateo. There are 2 age groups: 21-30 years old, and 50-70 years old, designed to capture cohorts where there are a number of life course transitions that might affect network composition. We begin with a total of 1200 respondents, half for each age group, and further divided up for urban, suburban and exurban regions. Three-quarters of the respondents will receive a face-to-face survey in wave 1, and one-quarter will be interviewed using a special web survey. In the next two waves a portion of the FTF interviews will be moved to the web survey pool. For more complete detail, see the Documentation page.

Will the data be available online?

We expect that we will have all three waves of the data available in 2018 for download.  Data for wave 1 are now available by request.

Will you prepare data sets for specific statistical packages (e.g., STATA)?

Researchers will be able to download programs to work with the data in STATA, SAS and SPSS.

Where can I find the study codebooks and questionnaires?

On the study Documentation page.

How can I report what appear to be errors in the data?

Contact our data analyst at

How can I learn how to use these data?

We will hold workshops at the annual meetings of the American Sociological Association and the Population Association of America and Sunbelt. See News and Events for more information about upcoming events.  We will also hold a special conference and workshop in Spring 2018.