Topic: Unblinded Re-Estimation and the Promising Zone

Maximum Sample Size Selection for Promising-Zone Designs

Measuring Efficiency With Expected Sample Size

Futility, Promise, and Sample Size Increase

Estimating Variance in Unblinded Re-Estimation

Evaluating Operating Characteristics by Simulation

Effect-Estimate Threshold Rules

Diagnostic: Instability From Noisy Interim Effects

Diagnostic: Misspecification of the Planning Effect

Diagnostic: Regression to the Mean After a Favorable Look

Diagnostic: Variance Estimation and Re-Estimation