Derivation
variable: repgp (table[s]: crs_cenm, css_sei_all)
variable: cluster (table[s]: crs_cenm, css_sei_all)
variable: hhlistno (table[s]: crs_cenm, css_sei_all)
variable: crshse (table[s]: crs_memball)
variable: house (table[s]: NCD_combined_data_all_final [derived table])
egen crshse=concat(repgp cluster hhlistno) if repgp~=""