Test graduate students' recall of the holdings and doctrinal tests from four landmark Supreme Court decisions shaping administrative law: Chevron (two-step deference for agency statutory interpretation), Auer (deference to agencies' interpretation of their own regulations), Skidmore (persuasive weight accorded to agency interpretations), and Motor Vehicle Manufacturers v. State Farm (arbitrary-and-capricious review and reasoned decisionmaking). Scope: case names, core tests, and primary applications.