用stata生成的空间权重矩阵,在引用时打不开是怎么回事啊?
spatwmat using 1.dta,name(w)
xtset id year
panel variable: id (strongly balanced)
time variable: year, 2006 to 2011
delta: 1 unit
spmat use w using"w.spmat"
cannot open w.spmat


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