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d egenms. egen function to create a moving sum.
d Program by Kevin Crow/Shannon Driver, StataCorp <kcrow@stata.com>.
d
d Create a new variable containing a #-period moving sum.  You
d may specify the number of lead() or lag() periods the moving sum
d should be comprised of.

f egenms/_gms.ado
f egenms/egenms.hlp