This appendix supplements the report "Stackable Credential Pipelines in Ohio: Evidence on Programs and Earnings Outcomes" (ED613593). In the appendix, the authors provide more details about the data and empirical approach, additional information about the samples, and some alternative results from analyses related to those that appear in the main report. The following are presented: (1) Data Sources; (2) Details on the Program Analysis; and (3) Details on the Earnings Analysis.