Here are some graphs that might be helpful:
Here are some deterrence links:
www.swcollege.com/bef/policy_debates/death_penalty.htmlCriminal Justice Legal Foundation list of deterrence abstracts and articles
Joanna M. Shepherd, Clemson University
Murders of Passion, Execution Delays, and the Deterrence of Capital Punishment
Journal of Legal Studies, vol. 33, no. 2, pp. 283-322 (June 2004)
people.clemson.edu/~jshephe/DPpaper_fin.pdf Paul R. Zimmerman
State Executions, Deterrence and the Incidence of Murder
Journal of Applied Economics, vol. 7, no. 1, pp. 163-193 (May 2004)
www.cema.edu.ar/publicaciones/download/volumen7/zimmerman.pdf Zhiqiang Liu
Capital Punishment and the Deterrence Hypothesis: Some New Insights and Empirical Evidence
Eastern Economic Journal, vol. 30, iss. 2, p. 237 (Spring 2004)
papers.ssrn.com/sol3/papers.cfm?abstract_id=352681 H. Naci Mocan & R. Kaj Gittings
Getting Off Death Row: Commuted Sentences and the Deterrent Effect of Capital Punishment
Journal of Law and Economics, vol. 46, no. 2, pp. 453-478 (October 2003)
Hashem Dezhbakhsh, Paul H. Rubin, & Joanna M. Shepherd
Department of Economics, Emory University
Does Capital Punishment Have a Deterrent Effect? New Evidence from Postmoratorium Panel Data
American Law & Economics Review, vol. 5, no. 2, pp. 344-376 (Fall 2003)
www.cjlf.org/deathpenalty/DezRubShepDeterFinal.pdf James A. Yunker, Western Illinois University
www.blackwellpublishing.com/issue.asp?ref=0038-4941&vid=82&iid=2&oc=&s=&site=1A New Statistical Analysis of Capital Punishment Incorporating U.S. Postmoratorium Data
Social Science Quarterly, vol. 82, no. 2, pp. 297-311 (2002)
Dale O. Cloninger & Roberto Marchesini
University of Houston -- Clear Lake
Execution and Deterrence: A Quasicontrolled Group Experiment
Applied Economics, vol. 33, no. 5, pp. 569-576 (2001)
ideas.repec.org/a/taf/applec/v33y2001i5p569-76.html