Exploiting a natural experiment for New York City restaurants we analyze whether consumers’ quality perception is influenced by newly appearing expert opinion. As the leading restaurant guide Zagat has rated New York City’s restaurants since 1979 by drawing on consumer surveys. In 2005, with...

This paper reports estimates of the productivity premium of German firms exporting to the Euro‐zone and beyond, controlling for unobserved time‐invariant firm‐specific effects. Furthermore, it tests for self‐selection of more productive firms into exporting beyond the Euro‐zone. The...

In regression analysis, the presence of outliers in the data set can strongly distort the classical least squares estimator and lead to unreliable results. To deal with this, several robust-to-outliers methods have been proposed in the statistical literature. In Stata, some of these methods are...