This book demonstrates how bounded rational decision models can be standardized and parameterized by socioeconomic data. Focusing on private energy technology investment decisions, the author shows how different representative agents can be constructed using search rules, analysis tools and decision strategies. Diffusion curves for energy technologies such as solar collectors, boilers and efficiency upgrades for buildings are calculated. Further, the model is extended to study the impact of firms' competition on technology diffusion. The modeling approach presented in this book may serve as a template for applications in other domains.