Source: Bureau of Labor Statistics, Current Population Survey.
We can judge from the chart that the higher degree can bring you higher income. Although the doctoral degree's income seems lower than professional degree, which has no influence in the common trend. Most of us always believe that if we have a high degree, we will hold a bright futher, which is true. But we omited a fact that if we work hard enough and have a great performance in work, we also have the chance to get more salary. Because employer pay us for our ability but not our certificate. So we just can say that higher degree can bring us more opportunity to get more salary. On the other hand, the person who has high degree tend to have good habit of learning, which will help them to adapt for the job and change. From above analysis, we learned that if we want a high pay, we need to study hard and get a high degree, besides we also need to improve our ability and have a good habit.