Hi everyone,
Im working with a panel of firm/years observations. My panel not only is unbalanced but also have some gaps in years. For example, firm 1 has 1999, 2000, 2001, 2004, 2005, firm 2 has 2000, 2001, 2003, 2005, and so on. Im using the plm package and what Im asking is how can I handle with this gaps ? Thank you very much, Cecília Carmo Universidade de Aveiro (Portugal) [[alternative HTML version deleted]]
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