The University of Pennsylvania Working Papers in Linguistics (PWPL) is an occasional series published by the Penn Graduate Linguistics Society. The series has included volumes of previously unpublished work, or work in progress, by linguists with an ongoing affiliation with the Department, as well as volumes of papers from NWAV and the Penn Linguistics Colloquium/Conference. This volume contains selected papers from the 40th Penn Linguistics Conference, held from March 18-20, 2016 in Philadelphia, PA, at the University of Pennsylvania. Thanks go to Luke Adamson, Faruk Akkuş, Hezekiah Akiva Bacovcin, Ryan Budnick, Spencer Caplan, Andrea Ceolin, Nattanun Chanchaochai, Mao-Hsu Chen, Sunghye Cho, Ava Creemers, Aletheia Cui, Sabriya Fisher, Duna Gylfadottir, Ava Irani, Helen Jeoung, Jordan Kodner, Wei Lai, Ruaridh Purse, Nari Rhee, Caitlin Richter, Milena Šereikaitė, Einar Freyr Sigurðsson, Betsy Sneller, Lacey Arnold Wade, and Robert J. Wilder for their help in editing. Since Vol. 14.2, PWPL has been an internet-only publication. As of September 2014, the entire back catalog has been digitized and made available on ScholarlyCommons@Penn. Please continue citing PWPL papers or issues as you would a print journal article, though you may also provide the URL of the manuscript. An example is below: Akkuş, Faruk and Balkız Öztürk. 2017. On Cognate Objects in Sason Arabic. In University of Pennsylvania Working Papers in Linguistics 23.1, ed. Djärv, Kajsa and Amy Goodwin Davies, 1-10. Available at: http://repository.upenn.edu/pwpl/vol23/iss1/2 Publication in the University of Pennsylvania Working Papers in Linguistics (PWPL) does not preclude submission of papers elsewhere; copyright is retained by the author(s) of individual papers. The PWPL editors can be contacted at: U. Penn Working Papers in Linguistics, Department of Linguistics, 3401-C Walnut Street, Suite 300, C Wing, Philadelphia, PA 19104-6228 and working-papers@ling.upenn.edu. Kajsa Djärv and Amy Goodwin Davies, Issue Editors