Original content by Bernard E. Harcourt and Jesús R. Velasco is licensed under a Creative Commons Attribution 4.0 International License.
When making use of such content on these pages under the terms of the CC license, please include this form of attribution: “Used under a CC BY/NC/SA license from Bernard E. Harcourt and Jesús Velasco.” If your needs are outside the scope of this license, please consider fair use or ask us for permission.
The Creative Commons license does not apply to the entries by any of our guest contributors. Guest contributors retain all copyright to their work. To use work by guest contributors please contact each individually to negotiate terms and conditions.