User's Guides
nEach data release is accompanied by a detailed cohort-specific user's guide.
nTechnical chapters describe survey procedures, sample selection, response rates, changes to the sample over time, weighting and design effects.
nTopical chapters summarize survey questions on a given topic, describe changes across rounds, explain which respondents are eligible to answer the questions, describe any created variables related to the topic, and provide special "user notes" with important information about various aspects of the data.