The Congressional Budget Office is a nonpartisan agency in the legislative branch that analyzes budget proposals put forward by members of Congress. Earlier this year, it evaluated the merits and drawbacks of a $15 an hour minimum wage.
Firstly, the study looks at negative effects, specifically that of employment. The report estimates that employment could decrease by 1/7% over a decade on average, with an estimated high of 3.3%. Secondly, the study examines more positive effects, such as increased real income, reduced poverty rates (with a chance of a high of a 3.3% reduction), and the number of workers whose wages would go up.
Overall, it is a very straightforward study, and one that is useful when covering the wage debate. You can read it here: https://www.cbo.gov/publication/55681