This document discusses the supply elasticity of wood. It begins by describing different types of wood including hardwoods, softwoods, and tropical hardwoods. It then defines supply and supply elasticity. Several factors can affect the supply elasticity of wood, including the nature of inputs used, natural constraints, risk tolerance of entrepreneurs, the nature of the commodity as durable goods, production costs, time factors, and production techniques. Population and income growth can also impact wood supply by increasing demand for forest products and putting pressure on forest resources. Examples are then provided to illustrate calculations of supply elasticity.