Commentary ( 80 pages ) [ on respective earlier chapters and Section II documents, concluding with mathematical " Notes " on the elasticity of substitution as to its definition, generalization to multiple factors and products, and application to Marshall rules of derived demand]
12.
Demand for transport is another good example of derived demand, as users of transport are very often consuming the service not because they benefit from consumption directly ( except in cases such as pleasure cruises ), but because they wish to partake in other consumption elsewhere.
13.
Beyond issues of the fundamental, " real " demand for medical care derived from the desire to have good health ( and thus influenced by the production function for health ) is the important distinction between the " marginal benefit " of medical care ( which is always associated with this " real demand " curve based on derived demand ), and a separate " effective demand " curve, which summarizes the amount of medical care demanded at particular market prices.
