+ wishlist Add to Cart The item has been added Author: John M. Gottman James D. Murray Catherine C. Swanson Rebecca Tyson Kristin R. Swanson The Mathematics of Marriage: Dynamic Nonlinear Models [9780262572309] Buy More - Save More. Below are the available bulk discount rates for each individual item when you purchase a certain amount Quantity Price Savings 25 - 49 4% 50 - 99 5% 100+ 6% List Price As Low as $40.00 Format: Paperback