n-period difference panel operator (Stata's Sn.var, e.g. S3.employment)

x - panel_lag(x, n, id, time) — a single subtraction against the value n periods ago (not an iterated first-difference).

Usage

panel_sdiff(x, n, id, time)

Arguments

x

Numeric vector to lag.

n

Number of periods to lag by.

id

Panel unit identifier vector (e.g. idf), same length as x.

time

Panel time vector (e.g. year), same length as x.

Value

A vector the same length as x.