1. Spectrum sharing or ‘If we build it, will they come?’ Martin BH Weiss Associate Dean School of Information Sciences University of Pittsburgh Pittsburgh PA USA mbw@pitt.edu

2. (CC BY-SA 2.0)—Filip Maljković (dungodung on Flickr)

3. Artwork Copyright © Rube Goldberg Inc. All Rights Reserved. RUBE GOLDBERG ® is a registered trademark of Rube Goldberg Inc. All materials used with permission.

4. http://forums.uktrainsim.com/viewtopic.php?f=216&t=84752

5. http://righttobe.files.wordpress.com/2010/01/recovered_2251975.jpg

6. http://eros.usgs.gov/imagegallery/collection.php?type=earth_as_art#5

7. What ‘they’ don’t want CC BY-NC-ND 2.0 Michael Fontenot (mshai at Flickr.com) (CC BY-NC-SA 2.0) Willy Volk on Flickr

8. M. Breidt/A. Krein, used with permission http://www.breidt.net/scripts/pics/hochb.jpg

9. © Mark Hurst. Used with permission.

10. Getting it right http://www.paulmidler.com/chinese-products-still-suck/

11. Will they come? CC BY-ND 2.0 by kecko on flickr.com

12. Types of DSA

13. Cooperative secondary sharing A Tonmukayakul and M Weiss “A study of secondary spectrum use using agent- based computational economics” Netnomics, 2008 (9:125-151)

14. Liquidity in license trading John Mayo and Scott Wallsten ‘Enabling efficient wireless communications: The role of secondary spectrum markets’ Information Economics and Policy, 22 (2010) 61–72.

15. Price trends for licenses http://www.spectrumbridge.com/products-services/specex/index.aspx

16. Used with permission. http://www.newsnshit.com/picture-gallery.html

17. Questions? http://www.webwhispers.org/news/apr2005.htm