This book presents a multiregional input-output model for the metropolitan area of Southern California, which helps to estimate the economic impact of simulated terrorist attacks on seaports, malls etc. as well as of natural disasters such as earthquakes and tsunamis. The authors also analyze the economic and social effects of metropolitan policies such as growth controls, neighborhood gentrification or road-congestion charges. The model presented in the book has evolved over a period of 25 years and requires a very substantial computer capacity.