How to Get Your Tightwad Spouse to Loosen Up
Money Magazine
Tightwads and Spendthrifts
Kiplinger
Life’s Extremes: Tightwads vs. Spendthrifts
LiveScience
Millennial Money: Use post-holiday sales to treat yourself
Associated Press
Financial Biological Determinism
The Atlantic
Black Friday: The Science of Tightwads and Spendthrifts
ABC News