The Bulletin of Cannabis Reform -- This site contains a treasure trove of useful research, including this 2006 study of marijuana production in the United States, in which researcher Jon Gettman concluded that marijuana is the #1 cash crop in the U.S. and the #2 cash crop in New Hampshire.

ABC News/Washington Post Poll -- This nationwide poll from January, 2010, shows 81% support for medical marijuana and 46% in favor of legalizing marijuana for adults. 

"Budgetary Implications of Marijuana Prohibition" -- A 2005 report by Harvard economist Jeffrey Miron, signed by over 500 economists, which analyzed the costs of prohibition and predicted $10-$14 billion in annual savings and revenues for the United States if marijuana was taxed and regulated.  The report estimated that with taxation and regulation of marijuana, New Hampshire could raise $5.6 million in taxes and save $20 million in law enforcement costs per year.