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
   4)Influence:
   a.Impulse response
   b.Gradual Causality
   c.Forecast error term variance decomposition
   3.Discussion of the economic results and significance

Sample Solution