What is a state's "jobs gap?" Its the number of jobs by which a state's job creation rate varies from the national jobs creation rate. A state can create jobs at a higher or lower rate than the national economy so the jobs gap number can be positive or negative.
In the case of Pennsylvania, it is negative, very, very negative.
Pennsylvania has created a stunning 140,000 less jobs since Governor Corbett took office in January 2011 than it would have had it created jobs at the same rate as the national economy. The excellent linked to analysis walks you through the Pennsylvania jobs gap number and includes a graph:
As the graph shows, the Pennsylvania jobs gap is getting worse each month, because Pennsylvania's rate of job creation has fallen dramatically during the last 12 months. From May, 2012 to May 2013, Pennsylvania created just about no jobs--less than 5,000.
And that means the Pennsylvania jobs gap is growing bigger and bigger each month.