Re: st: RE: RE: filling in missing panel data as a trend line

[Scott Cunningham <scunning@gmail.com>]

Jason,

It still seems like linear interpolation via -ipolate- gets you what  
you need.  My understanding of -ipolate- is that it draws a straight  
line between the two points in time.  Here's information about the  
methods and formula used to calculate the missing observation, drawn  
verbatim from the Stata 8 manual on -ipolate-:

"The value of y at x is found by finding the closest points (x0,y0)  
and (x1,y1),such that x0<x and x1>x, where y0 and y1 are observed,  
and calculating

y=(y1-y0)/(x1-x0) * (x-x0) + y0


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