The Journal of Econometrics awarded the 2021 Arnold Zellner Award for best theory paper published in 2019-2020 to NONPARAMETRIC IDENTIFICATION IN INDEX MODELS OF LINK INFORMATION by Wayne Gao, published in 2020, vol. 215. https://www.journals.elsevier.com/journal-of-econometrics/announcements/journal-of-econometrics-awards-announcement