Job Availability During a Recession: An Examination of the Number of Unemployed Persons Per Job Opening
http://www.bls.gov/opub/ils/pdf/opbils80.pdf
Explores how using certain data such as the unemployment level, and total job openings data, both seasonally adjusted, produces a ratio between the two series that serves as an indication of how the number of unemployed persons per job opening changes over time. From the Bureau of Labor Statistics.
