IPUMS-International Staff Directory Principal Investigators Steven Ruggles contact Principal investigator and project director Miriam King contact Deborah Levison contact Robert McCaa contact Matt Sobek contact Information Techonology Staff Bill Block contact Supervisor Colin Davis contact Tony Jiang contact Marcus Peterson contact James Shelburne contact Vladimir Vladykin contact Robert Wozniak contact Research Assistants Albert Esteve contact Research specialist Rodolfo Gutierrez-Montes contact Jessica Soto contact Amy Stenoien contact Michele Tertilt contact Gabriella Vazquez-Benitez contact Lana Wood contact Administration Susannah Smith contact Project administrator