Mark Hale is an American linguistics professor now teaching at Concordia University in Montreal, Quebec, Canada. He studies the methodology of historical linguistics as well as theoretical linguistics, Indo-European and Austronesian linguistics.
He has published numerous scholarly articles https://scholar.google.com/scholar?q=mark+hale and books https://books.google.com/books?as_q=&num=10&btnG=Google+Search&as_epq=Mark+hale&as_oq=&as_eq=&as_brr=0&as_pt=ALLTYPES&lr=&as_vt=&as_auth=mark+hale&as_pub=&as_sub=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&as_isbn=&as_issn= on his research. Along with colleague Charles Reiss, he is a proponent of substance-free phonology, the idea that phonetic substance is inaccessible to phonological computation.
Hale, M. (2007), Historical linguistics: Theory and method, Oxford, Blackwell
Hale, M., & Reiss, C. (2008),The Phonological Enterprise, Oxford: Oxford University Press
Hale, M., Kissock, M., & Reiss, C. (2014) An I-Language Approach to Phonologization and Lexification. Chapter 20. The Oxford Handbook of Historical Phonology. Edited by Patrick Honeybone and Joseph Salmons
Hale, M. (1998). Diachronic syntax. Syntax, 1(1), 1-18.
Hale, M.,(2004) Neogrammarian Sound Change, Chapter 7 in The Handbook of Historical Linguistics, Edited by: Brian D. Joseph and Richard D. Janda, Blackwell
Mark Hale & Charles Reiss (2000) Substance abuse and dysfunctionalism: Current trends in phonology. Linguistic Inquiry 31: 157âÂÂ169.