If the researchers of Million Dollar Money Drop were thinking about Post-it notes, perhaps they could have used a Post-it reminder to double-check their work. For it was a trivia question about the ...

You might have one sitting in a drawer right now. A simple quarter from 1976 that most people glanced at once, thought was ...

The 1999 penny error varieties remain some of the most exciting finds for collectors hunting through pocket change today.

After a run of more than 230 years, the U.S. is done producing the penny. While the death of the little copper coin leaves many feeling nostalgic, producing it simply isn’t worth it for the U.S. Mint ...

Have you ever looked down at your pocket change and wondered if any of those ordinary-looking quarters could be worth a small fortune? What if that 1976 coin with the drummer boy on the back isn't ...

Brits are being encouraged to "always" inspect a certain 50p coin, as it may prove to be a very scarce version. This particular piece could potentially sell for more than £40,000, it has been ...

The 1980 penny error coins represent some of the most exciting finds for collectors searching through pocket change. With over 12 billion pennies minted that year ...

Wrong planchet errors occur when a penny design is accidentally struck on a blank intended for a different denomination. The most valuable 1962 examples involve strikes on dime planchets or foreign ...

Double strike errors result when coins receive multiple die impressions before ejection. If the coin shifts position between strikes, overlapping designs create spectacular visual effects.

This repository explains and illustrates a variety of Cluster-Robust Heteroskedasticity-Consistent Standard Error estimators. It was created by Düzgün Dilsiz ...