Consumer behavior—or how people buy and use goods and services—is a rich field of psychological research, particularly for companies trying to sell products to as many potential customers as possible.

Chocolate chip cookies are always a hit. But use dark chocolate and make them dark chocolate chunk cookies with Fiori di Sicilia and you’ve got a homemade cookie nobody will ever forget. This ...

Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...