The backyard science experiment reaches its most exciting stage as ordinary rocks appear to transform into gemstone-like ...

The Nobel Memorial Prize in Economic Sciences was awarded Monday to David Card of the University of California, Berkeley, Joshua Angrist of the Massachusetts Institute of Technology and Guido Imbens ...

A natural experiment is an empirical study in which individuals (or clusters of individuals) are exposed to the experimental and control conditions that are determined by nature or by other factors ...

The work of David Card, Joshua Angrist and Guido Imbens, who were awarded the Nobel Prize in Economics on Monday, is based on "natural experiments", an innovative method of empirical research ...