title: iVAR: a program for imputing missing data in multivariate time series using vector autoregressive models.
abstract: This article introduces iVAR, an R program for imputing missing data in multivariate time series on the basis of vector autoregressive (VAR) models. We conducted a simulation study to compare iVAR with three methods for handling missing data: listwise deletion, imputation with sample means and variances, and multiple imputation ignoring time dependency. The results showed that iVAR produces better estimates for the cross-lagged coefficients than do the other three methods. We demonstrate the use of iVAR with an empirical example of time series electrodermal activity data and discuss the advantages and limitations of the program.
authors: Human Development and Family Studies, Department of Human Ecology, University of California, Davis, Davis, CA, 95616, USA, sweliu@ucdavis.edu.
authors: Siwei
authors: S
authors: Liu
authors: Peter C M
authors: PC
authors: Molenaar
mesh_terms: D000704:Analysis of Variance; D003198:Computer Simulation; D003627:Data Interpretation, Statistical; D006801:Humans; D008432:Mathematical Computing; D015233:Models, Statistical; D015999:Multivariate Analysis; D012044:Regression Analysis; D012984:Software; D060388:Support Vector Machine