TY - SER AU - Fernald,John G. TI - Trend breaks, long-run restrictions and the contractionary effects of technology improvements / T2 - CEPR Discussion Paper Series ; PY - 2006/// CY - London : PB - Centre for Economic Policy Research, KW - Cambio estructural KW - Ciclos económicos KW - Cambio tecnológico N1 - Incluye bibliografía ER -