Hello,
I am trying to plot coefficients from an event study using coefplot. You can see in my regression that I omit rel_date_x_diff5. In my regression results, it also shows that rel_date_x_diff19 is omitted--stata omits this one. However, in coefplot, a coefficient shows up for rel_date_x_diff19 with intervals and that is not zero. I am confused on how coefplot is plotting this when it has been omitted from my regression. Do you see any errors here? Thnaks in advance.
I am trying to plot coefficients from an event study using coefplot. You can see in my regression that I omit rel_date_x_diff5. In my regression results, it also shows that rel_date_x_diff19 is omitted--stata omits this one. However, in coefplot, a coefficient shows up for rel_date_x_diff19 with intervals and that is not zero. I am confused on how coefplot is plotting this when it has been omitted from my regression. Do you see any errors here? Thnaks in advance.
Code:
areg units rel_date_x_diff0-rel_date_x_diff4 o.rel_date_x_diff5 ///
rel_date_x_diff6-rel_date_x_diff19 rel_date0-rel_date19 i.qtr ///
if units_pre>=100, a(group_provider_service)
count if e(sample)
coefplot, keep(rel_date_x_diff*) vertical base omitted msymbol(diamond) ///
xtitle("QTR Relative to Price Change") ytitle("# of Units") title(">=100 units per QTR") ///
mcolor("106 208 200") ciopts(lcolor("118 152 160")) note("N=`r(N)'") ///
yline(0,lcolor("106 208 200") lpattern(dash)) xline(6, ///
lpattern(dash) lcolor(red)) scale(.8) xsize(9) ysize(7) ///
graphregion(fcolor(white) ifcolor(white) ilcolor(white)) ///
xscale(lcolor("0 51 102")) yscale(lcolor("0 51 102")) coeflabels(, truncate(10) angle(45)) ///
xlabel(, labcolor("0 51 102") noticks)
graph export ../output/es_units_diff_rate_units100.pdf, replace
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