Based on the research noted in the lectures at what level of
     Based on the research noted in the lectures, at what level of income does happiness appear to level off? 140,000 100,000 120,000 80,000  
  
  Solution
The correct choice is $ 80,000
Explanation:- An increase of happiness at a certain increase of income is smaller at higher levels of income than at lower levels. Happiness appears to level off at $ 80,000.

