Seminars

Fractional imputation for multivariate categorical data using graphical model averaging approach

Thursday, October 15, 2020 - 3:30pm to 4:30pm
Event Type: 

Speaker: Lei Zhou

Abstract: Handling missingness in multivariate categorical missing data is an important practical problem. Multiple imputation is a popular imputation method. We propose an alternative method using graphical model averaging approach with fractional imputation for dealing with multivariate categorical missing data. We illustrate the model selection and model averaging approaches and compare to multiple imputation. Both the simulation results and data application will be discussed.  Read more about Fractional imputation for multivariate categorical data using graphical model averaging approach

Small Area Estimation of Transition Probabilities in NRI

Thursday, November 5, 2020 - 3:30pm to 4:30pm
Event Type: 

Speaker: Xintao Xia

Abstract: The National Resources Inventory (NRI) is a repeated survey of land use on private land conducted by the Natural Resources Conservation Service of the United States Department of Agriculture in cooperation with Iowa State University. In NRI, imputation is used to represent land changing into urban from non-urban uses. We use small area estimation to update estimates of the transition probabilities and use transition probabilities as an new imputation guide. Read more about Small Area Estimation of Transition Probabilities in NRI