Error(s) in re-building vignettes:
  ...
--- re-building ‘biascorrection.Rnw’ using knitr
--- finished re-building ‘biascorrection.Rnw’

--- re-building ‘identification.Rnw’ using knitr
Error: processing vignette ‘identification.Rnw’ failed with diagnostics:
Running ‘texi2dvi’ on ‘identification.tex’ failed.
LaTeX errors:
! You can't use `macro parameter character #' in horizontal mode.
l.138 library(lfe)#
                   # Loading required package: Matrix
? 
! Emergency stop.
! Emergency stop.
l.138 library(lfe)#
                   # Loading required package: Matrix
End of file on the terminal!

!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘identification.Rnw’

--- re-building ‘lfehow.Rnw’ using knitr
Error: processing vignette ‘lfehow.Rnw’ failed with diagnostics:
Running ‘texi2dvi’ on ‘lfehow.tex’ failed.
LaTeX errors:
! You can't use `macro parameter character #' in horizontal mode.
l.388 summary(lm(Py ~ Px + Px2 + Px3 - 1))#
                                           #
? 
! Emergency stop.
! Emergency stop.
l.388 summary(lm(Py ~ Px + Px2 + Px3 - 1))#
                                           #
End of file on the terminal!

!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘lfehow.Rnw’

--- re-building ‘speed.Rnw’ using knitr
Error: processing vignette ‘speed.Rnw’ failed with diagnostics:
Running ‘texi2dvi’ on ‘speed.tex’ failed.
LaTeX errors:
! You can't use `macro parameter character #' in horizontal mode.
l.105 system.time(est <- felm(y ~ x | f1 + f2))#
                                                #    user  system elapsed
? 
! Emergency stop.
! Emergency stop.
l.105 system.time(est <- felm(y ~ x | f1 + f2))#
                                                #    user  system elapsed
End of file on the terminal!

!  ==> Fatal error occurred, no output PDF file produced!
--- failed re-building ‘speed.Rnw’

SUMMARY: processing the following files failed:
  ‘identification.Rnw’ ‘lfehow.Rnw’ ‘speed.Rnw’

Error: Vignette re-building failed.
Execution halted