Lu, Xun; Su, Liangjun - In: Quantitative economics : QE ; journal of the … 8 (2017) 3, pp. 729-760
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 test is a residual-based Lagrange multiplier-type...