What type of research is conducted in the article ?What levels of significance are used in the article?

Read the attached article . This study is the most recent article in terms of the frontline public service empowerment in Public Administration and Public Policy journals. In this study, Kang et al.  elucidates the hidden mechanisms between organizational/institutional characteristics and teacher empowerment.
Based on the article, please discuss the following questions:
1. What type of research is conducted in the article ?
2. What are the research hypotheses? Are the research hypotheses nondirectional or directional?
3. Are the null hypotheses stated or implied? If implied, please formulate the null hypotheses. 0.4 points.
4. What is the unit of analysis of the study? This is a very trick question. Be sure to check the sample sizes (N) provided in Table 3 on page 11. 0.5 points.
5. What is the sample of the study? What is the population of the study that the researchers are generalizing the results to?
6. What is the level of measurement of the six dependent variables in the study ?
7. Please see p-values in Table 4 . What levels of significance are used in the article?