请问STATA 如何使用BENFORD法则检验呢？

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请问STATA 如何使用BENFORD法则检验呢？
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关键词：Benford Stata 如何使用 tata Ford 如何

stata不是可以直接使用这个命令嘛

军少 发表于 2017-4-1 11:11
stata不是可以直接使用这个命令嘛

是在哪个位置呢？

自己下载安装

help for benford                             (Nikos Askitas)

Apply Benford's Law to a variable
---------------------------------------------------

        benford     varname [if] [in]


Description
-----------

benford reads in the values of a variable and returns a 4 column table:
Column 1 contains the digits 1 through 9, column 2 contains the total number
of values in the variable starting with that digit, Column 3 contains the
percentage Column 2 represents and Column 4 is what benfords law expects.
So the closer Columns 3 and 4 are the more your numbers conform to Benfords
law.

Remarks
-------

benford just presents the measurements in a form which makes it easy to inspect.
Both knowing whether your variable should conform to Benford's law or not and whether
the results suggest your dataset is authentic or rigged is up to you. The author is happy
to point the user to N. J. Cox's firstdigit module for a more comprehensive treatment
as well as acknowledge a masterful rewrite of the first - a more pedestrian - version.





Examples
--------
While developing I played with auto.dta which is both too small and contains no
variables which should conform to Benford's law. So to just see it work you can do:


. sysuse auto.dta
. benford price


The dataset http://www.stata-press.com/data/r9/census6.dta contains variables which
are suitable for Benford's Law. Although it is too small to get any reliable
distribution it still shows a relative conformity.


.   use http://www.stata-press.com/data/r9/census6.dta
.   benford pop

will return:

Digit     Count   Frequency       Benford
-----------------------------------------
1         10      20.00           30.10   
2         8       16.00           17.60   
3         5       10.00           12.50   
4         10      20.00           9.70   
5         7       14.00           7.90   
6         2       4.00            6.70   
7         2       4.00            5.80   
8         1       2.00            5.10   
9         6       12.00           4.60   
------------------------------------------




Author
------
Dr Nikos Askitas, IZA, Bonn, Germany.
Email: nikos@iza.org

蓝色 发表于 2017-4-1 12:21
自己下载安装

help for benford                             (Nikos Askitas)

谢谢啦~~~找到了~

蓝色 发表于 2017-4-1 12:21
自己下载安装

help for benford                             (Nikos Askitas)

谢谢啦~~~找到了~