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[程式] stata 工具變數外生性檢定

[ Statistics ]9 留言, 推噓總分: +4

作者: printscreen - 發表於 2014/05/24 23:55(10年前)

1^F推Yukirin:工具變數本來就不存在外生性檢定05/25 14:05

5^F推Yukirin:實務上會看第一階段的相關性檢定而已 Z跟U的相關沒有道理05/26 07:59

7^F推Yukirin:那是overidentification test05/26 18:39

Re: [問題] 準備進入統計系的新鮮人想請問...

[ Statistics ]8 留言, 推噓總分: +3

作者: MOONY135 - 發表於 2014/04/26 12:41(10年前)

1^F推Yukirin:統計系應該不會作賤自己到用SPSS吧04/27 12:36

[問題] 類似實驗組和控制組的比較

[ Statistics ]10 留言, 推噓總分: +1

作者: babyjack - 發表於 2014/04/07 09:23(10年前)

1^F推Yukirin:DID 設三個虛擬變數：樣本是否為後測、是否為B組04/07 10:39

2^F→Yukirin:還有一個是這兩個相乘跑迴歸04/07 10:39

[問題] 關於stata,multinomial logit,找PredictP

[ Statistics ]29 留言, 推噓總分: +5

作者: myjstyle - 發表於 2014/03/14 14:12(10年前)

1^F推Yukirin:第一個不是基本要求嗎.....03/14 14:31

6^F推Yukirin:為什麼怪怪的？03/14 14:38

14^F推Yukirin:predict指令就是作這件事情啊。難道跑一個回歸模型的時候03/14 14:42

15^F→Yukirin:你會期待mean(hat(y))跟mean(y)不一樣嗎？03/14 14:42

16^F→Yukirin:跑迴歸就是要用到X的資訊，直接算類別比例只有Y的。03/14 14:43

17^F→Yukirin:預測出來的比例要跟實際比例相同是基本要求，但不保證在模03/14 14:44

18^F→Yukirin:模型下分到A的樣本跟在實際資料中分到A的樣本一模一樣。03/14 14:44

21^F推Yukirin:mfx主要的用處是你可以試算說給定x1=??? x2=???時候的機率03/14 14:50

23^F→Yukirin:所以我猜你在沒有指定那些值的情況下，他給了你一個03/14 14:51

24^F→Yukirin:given x1=mean(x1) x2=mean(x2)下outcome==1的機率03/14 14:51

28^F推Yukirin:不用，其中一個樣本的機率你已經用predict得到了03/14 14:54

[問題] 列連表

[ Statistics ]2 留言, 推噓總分: +2

作者: mickey1231 - 發表於 2014/03/12 01:05(10年前)

1^F推Yukirin:性別放成PSM的關鍵X好尷尬啊...03/12 09:09

[問題] 為什麼用95%信賴區間?

[ Statistics ]13 留言, 推噓總分: +4

作者: redhound - 發表於 2014/03/04 13:24(10年前)

1^F推Yukirin:習慣而已也有人習慣看99啊03/04 13:53

[問題] parameter vs statistic

[ Statistics ]26 留言, 推噓總分: +3

作者: straw9685 - 發表於 2014/02/19 15:47(10年前)

1^F推Yukirin:如果是 y = mu + u , E(u) = 0 ,就算是用整個母體也"不保02/19 16:29

2^F→Yukirin:證" mean(y) = mu02/19 16:29

26^F推Yukirin:我上面的mean是指 sum(y)/N 不是expectation02/22 00:30

[問題] Adjust model by some factors 的問題

[ Statistics ]3 留言, 推噓總分: +2

作者: gsuper - 發表於 2014/02/11 11:36(10年前)

1^F推Yukirin:設I(unit==1)跟I(unit==2)兩個虛擬變數丟進去02/11 14:40

3^F推Yukirin:設NA就只有一個虛擬變數了啊要兩個02/13 21:50

[問題] 什麼是indication function

[ Statistics ]2 留言, 推噓總分: +1

作者: greatjus - 發表於 2014/01/21 12:54(10年前)

1^F推Yukirin:掉在那個範圍裡的話給１　其餘給０01/21 15:26

[問題] 不知道否為基礎統計的推理問題

[ Statistics ]2 留言, 推噓總分: +1

作者: ArchVSX - 發表於 2014/01/13 16:30(10年前)

1^F推Yukirin:你資訊只有這樣的話這個估計就是最適當的了01/13 16:42

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