Look at the https://github.com/eclab/ecj/blob/master/ecj/ec/gp/breed/SizeFairCrossoverPipeline.java Found it fairly doing well in controlling the bloat. Cheers Uday On Wed, Apr 13, 2016 at 10:37 AM, White, David <[log in to unmask]> wrote: > Hi Everyone, > > In 2008, Poli and McPhee published “Parsimony Pressure Made Easy: Solving > the Problem of Bloat in GP.” > > In the paper, they outline a fairly straightforward way of controlling > mean program size in a GP population. > > Has anyone implemented this in ECJ, please? I’d like to use it and don’t > want to repeat the effort if it’s already been done. > > Thanks! > > David >