Mixed-Frequency Data Byeongchan Seong, Sung K. Ahn, and Peter A. Zadrozny a Department of Statistics, Chung-Ang University, Seoul 156-756, Korea (e-mail: [email protected]) b Department of Management and Operations, Washington State University, Pullman, WA 99164-4736, USA (e-mail: [email protected]) c Bureau of Labor Statistics,2 Massachusetts Ave., NE, Washington, DC 20212, USA (e-mail: Zadrozny.Pet...