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发表于 2019-10-31 12:06:37
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Consider the following binary variable version of the fixed effects model. Each regressor DjDj
) d+ V) ]+ m3 j9 J Xis a binary variable that equals 1 when i = j and 0 otherwise. Note that the binary variable Upper D 1 Subscript iD1i
( ^( Q) a: }9 ]for the first group is arbitrarily omitted. # S. O9 A( J" R$ l
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Upper Y Subscript it equals beta 0 plus beta 1 Upper X Subscript it plus gamma 2 Upper D 2 Subscript i Baseline plus gamma 3 Upper D 3 Subscript i Baseline plus ... plus gamma Subscript n Dn Subscript i plus u Subscript itYit=β0+β1Xit+γ2D2i+γ3D3i+...+γnDni+uit 9 Q/ a7 T5 _- | x4 t7 b
8 u. x- G. B/ A/ s& P! {# ]6 B4 ^# tUse the regression in the equation above and the tool palette to the right to answer the following questions.
I( @9 f% x0 z) L6 i dWhat is the slope and intercept for entity 22 / q d0 q9 `7 s& p7 R
in time period 33?
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' S; }2 c: `2 S4 @! Z4 EThe slope of entity 22
9 w3 K& \( t3 Y# N: Gin time period 33 ' s/ F/ j2 J% y1 h1 }% _
is 33.7 R3 Z3 e _) e
! S4 [$ Y& U, \: V: F: e
The intercept of entity 22
2 R0 Y6 D& h3 xin time period 33 L5 O+ g6 \$ Q6 a# M
is nothing." a1 L. @1 L h8 e
0 H9 `& h% u3 R2 A/ Z6 X& ^: ?) Y
+ G' A. k* Q: b# ~6 d" J(Properly format your expressions using the tools in the palette. Hover over tools to see keyboard shortcuts. E.g., a subscript can be created with the _ character.)
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