WEIGHT: When applied to location theory, the relative attractive force of one activity to another based on transportation cost. The weight of an activity in this context is comparable to the weight of matter subject to gravitation forces. The weight of an activity is greater if it incurs higher transportation cost. As such, it is attracted, or pulled, to other activities to reduce transportation cost. With the weight (transportation cost) of an activity is often related to physical weight (heavier items cost more to move), it need not be. Other factors affecting weight include special handling (security, comfort) and type of transportation (walking, automobile, airplane).
