wfopen bb_us_test series lgdp=log(gdp)*100 'Sample 1947q1 to 2017q3 lgdp.bbq(turnphase=2, phase=2, cycle=5, thresh=10.4) 'Sample 1985q1 to 2017q3 smpl 1985q1 2017q3 lgdp.bbq(turnphase=2, phase=2, cycle=5, thresh=10.4) 'Sample 1990q1 to 2017q3 smpl 1995q1 2017q3 lgdp.bbq(turnphase=2, phase=2, cycle=5, thresh=10.4)