Here is some research on Charlotte, North Carolina, which appears to indicate the effectiveness of pro-life ad campaigns in reducing abortion rates:
North Carolina is heavily Democratic and its legislature is socially liberal; unlike Pennsylvania, no pro-life legislation is brought before the legislators. Charlotte’s population was estimated by the U.S. Census Bureau to be 709,441 in 2009, while the Charlotte metropolitan area had a 2009 population of 1,745,524.[1]
The median age of Charlotte residents is 34, and median family income is $59,452. The population is 55% White, 35% African-American, and 11% Latino. On religion, 69% of those in North Carolina reported in 2008 that “religion is very important in their lives,” and 49% say they attend religious services at least once a week.[2]
In 2006-07, North Carolina Right to Life targeted the Charlotte metropolitan area, where about a third of North Carolina’s 30,000 abortions a year are performed, with a three-week media campaign by Virtue Media, entitled Heart to Heart. The $66,000 campaign was a measurable success; in 2006-07, the most recent year for which North Carolina RTL has figures, there was a decrease of 1,853 abortions over the previous year’s 11,000, a reduction of over 16%; only one other region in the state had a decrease in the abortion rate; the others had an increase in abortions.[3] They are persuaded that their media campaign made the difference.
[1] Data is taken from “Charlotte, North Carolina,” in Wikipedia (http://en.wikipedia.org/wiki/Charlotte,_North_Carolina#cite_note-uscensusbureau1-1): "Table 1. Annual Estimates of the Population of Metropolitan and Micropolitan Statistical Areas: April 1, 2000 to July 1, 2008". U.S. Census Bureau. http://www.census.gov/popest/metro/tables/2008/CBSA-EST2008-01.csv. Retrieved 2009-09-29.
[2] “How Religious Is Your State?” a part of the June 2008 U.S. Religious Landscape Survey of the Pew Forum on Religion and Public Life (http://pewforum.org/How-Religious-Is-Your-State-.aspx)
[3] From the Ex. Dir.’s conversations with Barbara Holt, President of North Carolina RTL, November 2009 and September 23, 2010.
