Challenge your observation skills! Find all 3 differences in two pictures of a boy hiding under the bed in just 71 seconds.

Enjoy the Mainichi Shimbun's "spot the difference" puzzle. The rules are simple: find the seven differences between the two ...

Spot-the-difference puzzles improve visual memory and attention. Analyzing two pictures and pointing out differences between them is a challenging tas ...

Background: Difference-in-differences (DID) estimation has become increasingly popular as an approach to evaluate the effect of a group-level policy on individual-level outcomes. Several statistical ...

Spot the difference: There are 8 differences in this 1920s library picture. Can you spot them all in the given time? Test your observational skills with this puzzle.

Objective To estimate changes in healthcare spending in the US after implementation of the No Surprises Act (NSA) in 2022 ...