Expansion Date

Stock Number in Treatment Group

Stock Number in Control Group

Sample Period

First Expansion

Dec. 5, 2011

192

240

Dec. 4, 2010-Dec. 4, 2012

Second Expansion

Jan. 31, 2013

261

172

Jul. 4, 2012-Aug. 31, 2013

Third Expansion

Sep. 16, 2013

172

180

Feb. 1, 2013-Apr. 30, 2014