From The Wealth Report by Robert Frank at Wall Street Journal: The Perfect Salary for Happiness: $75,000
Also fodder for another survey:
The results are fascinating, especially in this conflicted age of materialism. But I wonder how they would differ by region or city. Would $75,000 mark the ultimate day-to-day contentment in such high-cost cities as New York City, Los Angeles or San Francisco? I doubt it. Perhaps the salary number would be lower in South Dakota or Mississippi.