This document discusses different models for estimating shelter requirements after earthquakes: SYNER-G, HAZUS-MH, ERGO-EQ, MCEER, InaSAFE, and RiskScape. It provides an overview of the conceptual frameworks and parameters considered in each model's calculations of displaced populations and shelter needs. These parameters include building damage, age, income, ethnicity, and others. The document also compares the outputs produced by each model, such as estimates of population displacement by geographic area or dwelling units. Future developments proposed include tailoring models to specific contexts and incorporating additional social and cultural factors.