Latest (December 2013) edition of Mathematics Competitions published
Table of Contents here.
WFNMC-8 Conference 2018
Call for Expressions of Interest.
Petar Kenderov's 2006 paper on the history of competitions
WFNMC-7 Conference 2014 Barranquilla, Colombia
The conference has its own web page here.
Call for papers. Please note further extension of deadline to 20 March.
Registrations are at here. Note that some functions such as credit
card payments might not yet be working.