English: Graph depicting a positive consumption externality with curves representing supply, private marginal benefit (private demand), and social marginal benefit (social demand). Equilibrium and optimal prices and quantities are marked, as well as the deadweight loss (gray triangle) and size of subsidy required to internalize the externality.
This graph image could be re-created using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{vector version available|new image name}}.
It is recommended to name the SVG file “Positive consumption externality graph.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.