Too bad the highest education level in the survey is "Bachelor or higher". I would have really liked to see the impact of having a Master or Phd. I wonder if an

Too bad the highest education level in the survey is "Bachelor or higher". I would have really liked to see the impact of having a Master or Phd. I wonder if an education level above Bachelor makes any difference in regard of unemployment or just for income. I am also curious how these numbers looked 30 or 40 years ago.