why would i use plm? how to approximate panel model in r which package does i use the estimate equation in pcm what is the equation for panel estimate what is the gdp equation in r what is r gdp and ppt r estimate gdp which method best describes an equation of a panel? how much does pvcm() cost in r how to estimate gdp on an r panel why do i need to estimate the equation for r what is the equation for panel estimation how to estimate panel of countries what is the equation of gdp what is the problem when estimating an equation in a panel? how do i estimate panel in r r how to estimate panel can panel model be estimated in r what is unique about predicting a panel how to calculate the equation gdp