You probably should not do panel data analysis but multiple time series analysis as your T is much larger than N. You only have seven units of observation but some 150 observations on each unit.
Also, if the values on each unit of observation are very close to each other between t and t-1, then you induce quasi-collinearity by including both in your model. It could be that plm automatically kicks (quasi-) collinear variables (without telling you). Best, Daniel -- View this message in context: http://r.789695.n4.nabble.com/Coefficients-for-lagged-plm-model-variables-not-calculated-tp3879867p3880390.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
