Why Buying Plum Jam Is Like Retaking the SAT

When shopping in a supermarket or deciding whether to retake a test, we should be aware of our left-digit bias.

A Surprising Car Fact

2 car price facts: A car whose mileage is 79,900 will cost approximately $10 less than one with 79,800. A car whose mileage is 80,000 will cost approximately $210 less than one with 79,900. For both, the rise was 100…