If the thought of spending years and years juggling work, family and classes keeps stalling your going-back-to-school ambitions, ask yourself this question: Is there a certificate or license in your field that would give your career a nice boost? If so, there’s a good chance it’ll give your paycheck a bigger bump than if you invested more time pursuing an associate degree. In its series “Some College, No Degree,” American RadioWorks highlights a national study of workers in their mid-30s showing that 43 percent of license and certificate holders earned more than associate’s degree grads. Tony Carnevale, director of the...