KATHERINE J. KLEIN is associate professor of industrial and organizational psychology at the University of Maryland. She is the author of numerous books, chapters, and articles, a fellow of the Society for Industrial and Organizational Psychology and the American Psychological Association, and a member of the editorial boards of key professional journals. Klein resides in Washington, D.C. STEVE W.J. KOZLOWSKI is professor of organizational psychology and program head at Michigan State University. The author of numerous books, chapters and articles, he serves on the editorial boards of key professional journals and is a fellow of the American Psychological Association and the Society for Industrial and Organizational Psychology.

• EXTENDING MULTILEVEL ORGANIZATIONAL THEORY. A Multilevel Approach to Theory and Research in Organizations: ContexualTemporal, and Emergent Processes. Personnel Selection Psychology: Multilevel Considerations. Performance Appraisal and Performance Management: A Multilevel Analysis. A Multilevel Approach to Training Effectiveness: Enhancing Horizontal andVertical Transfer. Moving HR to a Higher Level: HR Practices and Organizational Effectiveness. Interorganizational Relationships: A Multilevel Perspective. Multilevel Issues and Culture: An Integrative View. ANALYZING MULTILEVEL DATA. Within-Group Agreement, Non-Independence, and Reliability: Implications forData Aggregation. The Cross-Level Operator in Regression, ANCOVA, and Contexual Analysis. Within and Between Analysis: The Varient Paradigm as an Underlying Approachto Theory Building and Testing. The Application of Hierarchical Linear Modeling to Organizational Research. Multilevel Analytical Techniques: Commonalities, Differences, andContinuing Questions. COMMENTARY. Networks and Frog Ponds: Trends in Multilevel Research. Multilevel Competencies and Missing Linkages.

KATHERINE J. KLEIN is associate professor of industrial and organizational psychology at the University of Maryland. She is the author of numerous books, chapters, and articles, a fellow of the Society for Industrial and Organizational Psychology and the American Psychological Association, and a member of the editorial boards of key professional journals. Klein resides in Washington, D.C. STEVE W.J. KOZLOWSKI is professor of organizational psychology and program head at Michigan State University. The author of numerous books, chapters and articles, he serves on the editorial boards of key professional journals and is a fellow of the American Psychological Association and the Society for Industrial and Organizational Psychology.

• EXTENDING MULTILEVEL ORGANIZATIONAL THEORY. A Multilevel Approach to Theory and Research in Organizations: ContexualTemporal, and Emergent Processes. Personnel Selection Psychology: Multilevel Considerations. Performance Appraisal and Performance Management: A Multilevel Analysis. A Multilevel Approach to Training Effectiveness: Enhancing Horizontal andVertical Transfer. Moving HR to a Higher Level: HR Practices and Organizational Effectiveness. Interorganizational Relationships: A Multilevel Perspective. Multilevel Issues and Culture: An Integrative View. ANALYZING MULTILEVEL DATA. Within-Group Agreement, Non-Independence, and Reliability: Implications forData Aggregation. The Cross-Level Operator in Regression, ANCOVA, and Contexual Analysis. Within and Between Analysis: The Varient Paradigm as an Underlying Approachto Theory Building and Testing. The Application of Hierarchical Linear Modeling to Organizational Research. Multilevel Analytical Techniques: Commonalities, Differences, andContinuing Questions. COMMENTARY. Networks and Frog Ponds: Trends in Multilevel Research. Multilevel Competencies and Missing Linkages.

KATHERINE J. KLEIN is associate professor of industrial and organizational psychology at the University of Maryland. She is the author of numerous books, chapters, and articles, a fellow of the Society for Industrial and Organizational Psychology and the American Psychological Association, and a member of the editorial boards of key professional journals. Klein resides in Washington, D.C. STEVE W.J. KOZLOWSKI is professor of organizational psychology and program head at Michigan State University. The author of numerous books, chapters and articles, he serves on the editorial boards of key professional journals and is a fellow of the American Psychological Association and the Society for Industrial and Organizational Psychology.

• EXTENDING MULTILEVEL ORGANIZATIONAL THEORY. A Multilevel Approach to Theory and Research in Organizations: ContexualTemporal, and Emergent Processes. Personnel Selection Psychology: Multilevel Considerations. Performance Appraisal and Performance Management: A Multilevel Analysis. A Multilevel Approach to Training Effectiveness: Enhancing Horizontal andVertical Transfer. Moving HR to a Higher Level: HR Practices and Organizational Effectiveness. Interorganizational Relationships: A Multilevel Perspective. Multilevel Issues and Culture: An Integrative View. ANALYZING MULTILEVEL DATA. Within-Group Agreement, Non-Independence, and Reliability: Implications forData Aggregation. The Cross-Level Operator in Regression, ANCOVA, and Contexual Analysis. Within and Between Analysis: The Varient Paradigm as an Underlying Approachto Theory Building and Testing. The Application of Hierarchical Linear Modeling to Organizational Research. Multilevel Analytical Techniques: Commonalities, Differences, andContinuing Questions. COMMENTARY. Networks and Frog Ponds: Trends in Multilevel Research. Multilevel Competencies and Missing Linkages.