This may be helpful so you can estimate it with a straight logit. http://www.rochester.edu/college/psc/signorino/research/CarterSignorino2007. pdf From: gov2001-l-bounces at lists.fas.harvard.edu [mailto:gov2001-l-bounces at lists.fas.harvard.edu] On Behalf Of John Sheffield Sent: Wednesday, April 23, 2008 6:23 PM To: gov2001-l at lists.fas.harvard.edu Subject: [gov2001-l] logit model for binary time series cross-sectional Has anyone run across an R package that does logit models for TSCS or BTSCS data? I started writing my own code, but reinventing the wheel isn't terribly efficient... Thanks, J