This document provides an in-depth analysis of turnover, motivation, and research methods. It explores the theories of employee turnover, including firm-specific human capital theory and job matching theory. The document also compares Maslow's theory, Hertzberg's theory, and expectancy theory of motivation. Additionally, it discusses the advantages and limitations of primary and secondary research, as well as the concepts of sampling and qualitative research. Suitable for students studying HR, management, or research methods.