Impulse response

Summarize this paper from a mathematical point of view and combine the knowledge of time series and VAR.
The requirements:

  1. Main Question of the passage(1-2 Paragraph)
    2.Describe the econometric methodology
    1)Data( variable,date)
    2)VAR Specification(main equation used)
    3)Identification Strategy used
    a.Impulse response
    b.Gradual Causality
    c.Forecast error term variance decomposition
    3.Discussion of the economic results and significance

Sample Solution