list( y = c( 0.03, 0.12, -0.14, 1.18, 0.26, -0.06, -0.02, -0.32, 0.27, 0.80,
             0.54, 0.18, -0.02, 0.23, -0.18, -0.06, 0.30, 0.07, -0.07), 
      x = c( 2, 3, 3, 0, 0, 3, 3, 3, 0, 1, 0, 0, 1, 2, 3, 3, 1, 2, 3 ), 
      tau = c( 64.0, 46.3, 35.9, 7.19, 7.34, 94.3, 94.3, 20.7, 37.2, 15.9, 
               11.0, 20.1, 12.0, 11.9, 39.6, 35.9, 51.8, 113.2, 33.0), 
      n = 19 )