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The textbook emphasizes the critical interpretation and practical application of research findings, and covers many cutting-edge issues and methods including: *a more in-depth, contemporary focus on causation the logic and use of control variables with non-experimental data *the use of visual path diagrams to better understand both causation and the use of control variables *a fuller, more innovative treatment of quasi and natural experiments *a focus on data collection for performance measurement *a discussion of cutting-edge issues in sampling and survey research *an integrated treatment of qualitative methods that appears throughout the book and emphasizes the integration of qualitative with quantitative methods.