This document discusses several topics related to group and situational effects on customer behavior: - Collective decision making in organizational buying involves sharing information and developing organizational memory to make important purchase decisions. - B2B e-commerce allows exchanges of information, products, services, or payments online through catalogs and auctions among suppliers and purchasers. - Defining the modern family looks at extended and nuclear families as well as households containing at least two related individuals in today's culture of divorces and separations.