Studies also show that patients diagnosed with functional heartburn exhibit a high percentage of psychological stress.

WSJ: Why Your Heartburn Drugs Don't Work

Others blame high levels of psychological distress.

CNN: Strains in the Workplace

With the percentage of unmarried young people at historically high levels, the psychological and social circumstances of these people are of great interest.

FORBES: Zen and Loneliness in Japan

Wealth managers, psychologists and financial advisers say the age of high-beta wealth requires new financial and psychological tools to make and preserve family fortunes.

WSJ: The Truth About Wealth

This implies that the social, psychological or family disruption costs of breaching their mortgage contract must have been quite high.

FORBES: NGDP in the Long Run and Economic Plasticity

By applying billions of dollars to research and development into new manufacturing processes and materials like carbon fiber, companies like GE have kept some of their most expensive and profitable products in factories in the U.S. It means high-paying jobs for workers with a specialized skills and the psychological capacity to work in a variety of roles.

FORBES: GE Keeps Manufacturing Jobs In US -- For Highly Skilled

The psychological shift Samuelson has identified is not the cause of slow economic growth and persistent high unemployment.

FORBES: Boehner And Obama's Economic Confusion Breeds Bipartisan Disarray