Seth Crawford sits down in the chair of his office in Ballard Hall on the Oregon State University campus. The shoes come off almost immediately — a Crawford trademark. Construction noise from the adjacent work on the Johnson Hall engineering building rattles through the window on a warm summer afternoon.
Crawford has three monitors on his desk, but he doesn’t seem to need them. All of the data seems to be in his head. He spits out facts and he spits them out fast.
His subject: marijuana, whose recreational use became legal July 1 in Oregon.
Crawford, 34, a sociology instructor at OSU, has become a go-to guy on pot, particularly the economics of pot and