什么文章？
提供一下啊，看看怎么说的

The 52-week high momentum strategy in international stock markets中第184页写道：“We report the GH momentum profits for each market in Panel A of Table 2. Returns of winners and
losers are reported in the second and third columns, respectively, followed by WML (Winners minus
Losers) representing momentum profits, and the Newey and West (1987) adjusted t-statistics.10
Eighteen of the 20 stock markets in our sample exhibit positive GH momentum returns.”下面是文章中的表，括号内的就是Newey-west调整后的t值

Profits from GH, JT, and MG momentum strategies.
Market Panel A: GH 52-week
high strategy
Panel B: JT (12,1,6) strategy Panel C: MG industrial
momentum strategy
Winner Loser WML t-value Winner Loser WML t-value Winner Loser WML t-value
Australia 1.82 1.40 0.42 (1.17) 2.02 1.42 0.59 (2.22) 1.85 1.29 0.56 (1.95)
Austria 0.69 0.27 0.42 (1.35) 0.88 0.25 0.63 (2.13) 0.62 0.46 0.16 (0.82)
Belgium 1.64 1.04 0.60 (3.55) 2.17 0.71 1.46 (6.76) 1.37 0.82 0.55 (3.45)
Canada 1.62 1.30 0.32 (1.00) 1.79 1.19 0.60 (2.80) 1.72 1.20 0.52 (2.40)
Denmark 1.44 0.67 0.77 (2.89) 1.43 0.79 0.64 (2.94) 1.29 0.99 0.31 (1.66)
France 1.82 0.93 0.88 (4.51) 1.85 1.05 0.80 (4.65) 1.68 1.24 0.44 (3.06)
Germany 1.08 0.20 0.88 (3.32) 1.08 0.29 0.79 (3.63) 0.91 0.50 0.41 (2.06)
Hong Kong 1.74 0.96 0.79 (2.30) 1.49 1.30 0.19 (0.65) 1.51 1.14 0.37 (1.79)

你可以查newey那篇文献，不是你说的那就检验
自相关回归时调整标准误，才是newey west的方法。
你可以看计量经济学教科书
stata有newey命令，引用就是你说的那篇文献

好的，谢谢！我再仔细看看，另外想请教个问题，我将数据构建了10个组合，现在之后用以下命令输出结果后，再拷贝粘贴到excel中，但是特别麻烦，这里group0共有10个
sort group0 tradedate
by group0: tabstat stockreturn, s(n mean) by(tradedate)

想将组合的收益率按日期保存为excel格式，怎么才能实现呢？

您好！请问您的问题解决了么？我也碰到了同样的问题呢，谢谢！