第3个回答 2020-03-01
计量经济学实验STATA:
stata基本知识:
1、基本操作
:
(1)窗口锁定:Edit-preferences-general
preferences-windowing-lock
splitter
(2)数据导入;
(3)打开文件:use
E:\example.dta,clear
(4)日期数据导入:
gen
newvar=date(varname,
“ymd”)
format
newvar
%td
年度数据
gen
newvar=monthly(varname,
“ym”)
format
newvar
%tm
月度数据
gen
newvar=quarterly(varname,
“yq”)
format
newvar
%tq
季度数据
(5)变量标签
:
Label
variable
tc
`
“total
output”
’
(6)审视数据:
describe
list
x1
x2
list
x1
x2
in
1/5
list
x1
x2
if
q>=1000
drop
if
q>=1000
keep
if
q>=1000
(7)考察变量的统计特征:
summarize
x1
su
x1
if
q>=10000
su
q,detail
su
tabulate
x1
correlate
x1
x2
x3
x4
x5
x6
(8)画图
:
histogram
x1,
width(1000)
frequency
kdensity
x1
scatter
x1
x2
twoway
(scatter
x1
x2)
(lfit
x1
x2)
twoway
(scatter
x1
x2)
(qfit
x1
x2)
(9)生成新变量:
gen
lnx1=log(x1)
gen
q2=q^2
gen
lnx1lnx2=lnx1*lnx2
gen
larg=(x1>=10000)
rename
larg
large
drop
large
g
large=(q>=6000)
replace
large=(q>=6000)
drop
ln*
(10)计算功能:
display
log(2)
(11)线性回归分析:
regress
y1
x1
x2
x3
x4
vce
#显示估计系数的协方差