Gustav Tinghög (IMAGE) Linköping University Caption Gustav Tinghög, one of the researchers behind the study, and associate professor in economics at Linköping University. Credit Thor Balkhed Usage Restrictions Only for press License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.