At the Center he has conducted research and done executive training using field-tested readership-building ideas. He has taught leaders at major media companies across the U.S., as well as in Canada, Spain, Norway, Sweden and Austria. Duke is a contributor to Medill on Media Engagement, Hampton (2010), which draws on the Center’s research. Prior to joining Northwestern, Duke was a journalist for 26 years at major U.S. newspapers and was editor of a magazine devoted to digital publishing.