groups is unknown and has to be determined empirically. We propose a testing procedure to determine the number of groups. Our … asymptotically normally distributed under the null hypothesis of a given number of groups and has the power to detect deviations from …We consider a latent group panel structure as recently studied by Su, Shi, and Phillips (2016), where the number of …

groups is unknown and has to be determined empirically. We propose a testing procedure to determine the number of groups. Our … asymptotically normally distributed under the null hypothesis of a given number of groups and has the power to detect deviations from …We consider a latent group panel structure as recently studied by Su, Shi, and Phillips (2016), where the number of …