So, You Want to Get Rid of the Penny. Do You Have a Plan for the Nickel? (nytimes.com)

It's pretty clear getting rid of the penny will cost money, because people will need more nickels, and the difference between the face value of a nickel and the cost to make one is much greater than that of the penny.

Previously: https://news.ycombinator.com/item?id=43016895