4), .Dim = c(16, 2)),<br>Ncum = structure(.Data = <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c( 59, 122,<br>157, 170,<br>173, 173,<br>175, 175,<br>186, 226,<br>253, 268,<br>270, 270,<br>271, 271,<br>271, 278,<br>278, 280,<br>280, 281,<br>281, 281,<br>282, 284, <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;285, 285,<br>285, 286,<br>286, 286), .Dim = c(16, 2)),<br>treat = structure(.Data = <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c( 1, -1, <br>-1, 1), .Dim = c(2, 2)),<br>period = str