Computer code (using R) for Economic Growth and Evolution: Parental Preference for Quality and Quantity of Offspring can be downloaded from the following links:
Code for two genotype simulation
Code for three genotype simulation
You can download the open source R statistical package here.
Computer code (using NetLogo) for Population, Technological Progress and the Evolution of Innovative Potential can be downloaded here.
You can download the open source NetLogo package here.