sentences:  As more experiments have been conducted in economics, questions about appropriate methodology and study organization has been raised.Jerome Hergueux and Nicolas Jacquemet developed an "online laboratory" to compare social preferences and risk aversion online and in person.They administered a risk aversion assessment, Public good game, a Trust game, a Dictator game, and an Ultimatum game to groups both online and in a lab as a way of assessing the internal validity of web-based experimentation in economics.