Emp_event_pretrend b se min95 max95 1919.Year#c.DaysofNPI .0002009 .0008932 -.0016016 .0020035 1921.Year#c.DaysofNPI -.0000928 .0008823 -.0018733 .0016877 1923.Year#c.DaysofNPI -.0002741 .0008505 -.0019905 .0014423 1925.Year#c.DaysofNPI .0003375 .0012029 -.00209 .002765 1927.Year#c.DaysofNPI .000031 .0012794 -.0025511 .002613