Uploaded by papperkatt

Untitled Notebook

advertisement
fattening
Samman
Enhla bivariate
•
•
air oftast
control
Regression
-0
Huvudantagande
"
mer
✗
=
C
(*
,
AX
+
,
)
U
,
=
+ u
0
problemet
:
y
✗
=
conditional
good
as
→
precision
"
Xz makes ☒ ,
Y
:
er
causalitet kroivs
Vid
selection
•
regression
P
+
X,
,
mean
Pz Xz
+
u
independence
randomized
as
+
"
"
E
-0
/u/ ×
,
,
)
Xz
kontrollera for Xz giir
,
E
=
×
,
( ) Xz)
U
random
RCT
=ʰ eftersom
•
→
niojligt
att
skatta
regression
antagande
starlet
•
randomiserat
Sample
200,300
size
randomiserat
inte
annars
,
IV
•
(
◦
↳
(2
,
U
)
C. X
=D
Za
restriction
:
2) =/
0
Randomiserat
.
fair inte
Instrumentet
form
skatta reduced
,
instrument relevance
,
Exclusion
2. b.
,
restriction
fettermen
2 correlerad med
Exclusion
↳
(
Instrument diir
ha
effektpa
outcome noir detta inte
that/er oftast
utfall
ej
hitter
DD
Potential outcome
E( Yo /
↳
:
1-
=
1
A- l
-
,
)
trends
Parallel
-
E
/ Yo / 1-
=
1,
A- O
-
)
=
E( Yo /
1-
=
0 , A--1 )
-
E
/ Yo / T -0
-
A- O
-
,
)
assumption
Panel data
✗
✗
=
it
+
P
,
✗ it
+
Uit
+×i±
C
,
/ ✗ it
,
his
/
=
0
for
alla
s
.
t
strict
exogeneity
vid
brytpunkten
Individual
dummies
RD
✗
Griinsviirdetniir
↳
tim
✗
↑ Xo
Elyot ×)
=
T
running
variable
gcirmot
Iim
✗
to Xo
Xo
E(Yolx)
=
noir X
goir
her
motto
"
randomiserade
"
Download