CORVALLIS, Ore., Nov. 8 (UPI) -- Studies have shown marriage changes men's negative behavior and U.S. researchers say fatherhood can also have an impact on crime, and tobacco and alcohol use.
Lead author David Kerr, assistant professor of psychology at Oregon State University, and colleagues assessed more than 200 at-risk boys annually from the age of 12 to 31 in how their crime, tobacco, alcohol and marijuana use changed over time.