Public program evaluation a statistical guide von Langbein, Laura Irwin

Public program evaluation a statistical guide von Langbein, Laura Irwin

Discovering whether programs work a guide to statistical methods for program evaluation von Langbein, Laura Irwin

Discovering whether programs work a guide to statistical methods for program evaluation von Langbein, Laura Irwin

Discovering whether programs work a guide to statistical methods for program evaluation von Langbein, Laura Irwin

Ecological inference von Langbein, Laura Irwin

Ecological inference von Langbein, Laura Irwin, Lichtman, Allan J.

Ecological inference von Langbein, Laura Irwin

Ecological inference von Langbein, Laura Irwin