Assistant Professor
Department of Economics
Grand Valley State University 

My primary research interests are in the fields of health economics, labor economics, and applied econometrics. I am particularly interested in issues related to health care utilization, health insurance, and the industrial organization of health care markets. In addition, I've conducted research on health behaviors, health determinants, and substance abuse. 

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Contact Information:
Department of Economics
Seidman College of Business
Grand Valley State University
50 Front Ave. SW
Grand Rapids, MI 49504-6424

Email: callisok@gvsu.edu
Phone: (614) 989-1764