Robin Clark's paper: "The Spontaneous Emergence of Language Variation from a Homogeneous Population"
(Robin Clark and Steve Kimbrough, authors) won best paper at CSSSA 2015.
Links:
The Paper:
http://computationalsocialscience.org/wp-content/uploads/2015/10/CSSSA_2015_submission_13.pdf
About CSSSA:
https://computationalsocialscience.org