R: Vignettes and other documentation

# Vignettes and other documentation

## Vignettes from package 'lfe'

lfe::biascorrection |  | Limited mobility bias correction | PDF | source |
lfe::identification |  | Multicollinearity, identification, and estimable functions | PDF | source | R code
lfe::lfehow |  | How lfe works | PDF | source | R code
lfe::speed |  | Convergence rate with examples | PDF | source | R code

## Other files in the doc directory

| CHANGELOG
| gen2.R
| lfeguide.txt
| test2.lfe