(1) The introduction of flexible reporting period options in 2004 seems to have had little beneficial impact on item nonresponse for asset income amounts.
(2) Extending the “range”-type follow-ups to cover all assets resulted in major nonresponse benefits. Asset types which acquired the range follow-ups for the first time in 2004 showed substantial declines in final wave 1 item nonresponse in 2004 compared to 2001.
(3) The dependent nonresponse follow-up option added in 2004 wave 2 also had a major positive impact on final nonresponse. On the negative side, however, is evidence of improper use of the dependent follow-up procedures by SIPP interviewers, resulting in very high rates of initial nonresponse.
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