TY - JOUR TI - Threshold effects in non-dynamic panels: Estimation, testing, and inference AU - Bruce E. Hansen JO - Journal of Econometrics PY - 1999 VL - 93 IS - 2 DO - 10.1016/s0304-4076(99)00025-1 UR - https://doi.org/10.1016/s0304-4076(99)00025-1 ER -