This report presents the findings of an investigation of alternative forms of weighting adjustment to compensate for panel nonresponse in the Survey of Income and Program Participation (SIPP), an ongoing household panel survey conducted by the U.S. Bureau of the Census. Panel surveys like the SIPP experience some level of total nonresponse at the initial wave of data collection. This nonresponse corresponds to the total nonresponse that occurs with cross-sectional surveys. In addition to the initial wave nonresponse, panel surveys also experience further nonresponse at each of the subsequent waves of the panel. It is this additional nonresponse that is classified as panel nonresponse in this report. Panel nonresponse is thus the failure to collect the survey data for initial wave respondents for all waves of the panel for which they were eligible. The weighting adjustments studied here aim to modify the weights of panel respondents (i.e., those who provide data for all waves for which they are eligible) to compensate for the panel nonrespondents.