This ​poster compares aggregate estimates in the redesigned 2014 SIPP panel against similar estimates from National Income and Product Accounts (NIPA) and program administrative data sources. Focusing on program and retirement income across the four waves of the 2014 SIPP panel, it compare​s yearly aggregate respondent counts and benefit summary measures for SIPP and NIPA.​ The poster investigate​s seam bias by comparing beneficiary counts and program transitions against available monthly program administrative data. As a measure of nonresponse, it compares proportions of imputed income across program income sources in SIPP and CPS.