Carnevale, A. P., Rose, S. J., & Hanson, A. R. (June 2012). Certificates: Gateway to Gainful Employment and College Degrees. Georgetown University, Center on Education and the Workforce.
Although there are many voices calling for the creation of more flexible alternatives to the 4-year bachelors paradigm, most of the discussion seems to be prospective, rather than descriptive. A helpful report published by the Georgetown University Center on Education and the Workforce last month on the use of certificates does a great deal to fill this gap.