“…To date, there has been a clear emphasis on measuring the consumer surplus of visitors’ recreational use of natural reefs ( reviewed in Peters & Hawkins , 2009 ). In contrast, only a handful of contingent valuation studies appear to have measured visitors’ consumer surplus relating to recreation-orientated artificial reefs ( Bell, Bonn & Leeworthy , 1998 ; Ditton & Baker , 1999 ; Johns et al , 2001 ; Johns , 2004 ; Crabbe & McClanahan , 2006 ; Oh, Ditton & Stoll , 2008 ; Hannak et al , 2011 ; Chen et al , 2013 ). However, none of these studies used marine park user fees as the payment vehicle to estimate consumer surplus, and just three papers ( Johns et al , 2001 ; Johns , 2004 ; Oh, Ditton & Stoll , 2008 ) estimated recreational values of artificial and natural reefs in the same locality.…”