It is in the Contract: How the Policies Set in Teachers’ Unions’ Collective Bargaining Agreements Vary Across States and Districts

We examine more than 1,000 collective bargaining agreements (CBAs) in place across California, Michigan, and Washington. We investigate the prevalence of a set of 43 key provisions between and within these states, providing the first comprehensive comparison of CBA terms using data drawn from economically and demographically different districts, as well as districts that vary considerably by student enrollment. We find that CBAs vary substantially within and across states, and that this variation is more associated with district size than the proportion of low-income students within districts. We conclude by discussing the implications of these findings for research and policy