“Former vice president Joe Biden is now the presumptive Democratic nominee for president — after a primary involving months of campaigning, 28 Democratic candidates and over $1 billion in ads," he writes. "Did any of that affect the result? Not much, our research suggests — but they weren’t meaningless.”
Serge Petchenyi/Cornell University Center for Teaching Innovation
Alexandra Werth, assistant professor of biomedical engineering and member of the Duffield Engineering Education Research Institute, teaching a seminar in biomedical engineering