Background and Motivation.- Valuation in Modern Software Markets.- Investment and Company Valuation.- Modern Software Markets.- Reconsideration of Valuation in Software Markets.- Modeling Network Effects in Software Markets.- Network Economics in Software Markets.- Customer-Equity Valuation in Software Markets.- Adoption and Diffusion Models for Software Markets.- Network Effects Valuation Framework For Software Markets.- Reconsideration of Network Effects in Software Markets.- Modeling Customer Networks from a Complex Networks Perspective.- Complex Networks Theory.- Complex Networks Adoption and Diffusion Simulator.- Complex Networks Analysis of Customer Networks.- Complex Networks Framework for Valuation in Software Markets.- Reconsideration of Complex Customer Networks in Software Markets.- Summary, Implications, Limitations, and Outlook.- Summary of Findings.- Implications of Results.- Research Limitations.- Research Outlook.- Executive Summary.