Warren Bickel (IMAGE) Virginia Tech Caption Warren Bickel’s research project will forecast the impact of tobacco tax proposals in a complex experimental marketplace that continually changes with the introduction of new products. Credit Photo by Clayton Metz for Virginia Tech. Usage Restrictions Virginia Tech License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.