A new study is challenging the conventional wisdom that happiness comes with age.

Using data from as far back as the 1970s, San Diego State University professor Jean Twenge and her team found that people in their 30s and up used to be a lot happier than those in their 20s and teens.

But that’s not the case anymore today.

Social Psychological and Personality Science

Guest:

Jean Twenge, a professor of psychology at San Diego State University who is the study's lead author. She is also the author of the book, “Generation Me: Why Today's Young Americans Are More Confident, Assertive, Entitled--and More Miserable Than Ever Before” (Free Press, 2006)