fuse_time               Fused Unobserved group Spline Estimation of
                        TIME varying coefficients
grouped_plm             Grouped Panel Data Model
grouped_tv_plm          Grouped Time-varying Panel Data Model
pagfl                   Pairwise Adaptive Group Fused Lasso
sim_DGP                 Simulate a Panel With a Group Structure in the
                        Slope Coefficients
sim_tv_DGP              Simulate a Time-varying Panel With a Group
                        Structure in the Slope Coefficients
