American trade policy towards Sub Saharan Africa –- a meta analysis of AGOA

(1)

T-stat

(2)

T-stat

(3)

T-stat

T-stat
precision

0.00504

-1.181^***

-0.0458

(0.009)

(0.105)

(0.405)

no. of explanatory variables

0.0267^***

0.0422^***

product effects = 1

(0.002)

0.811^***

(0.000)

0.398^***

logged dep. var. = 1

(0.060)

0.769^***

(0.092)

0.337^***

country effects = 1

(0.104)
0.0420

(0.082)

-0.147

published = 1

(0.057)

0.103⁺

(0.183)
0.0123

N (in logs)

no. of years (logs)

no. of countries (logs)

annual = 1

time effects = 1

cross section = 1

other preferences included = 1

gravity regression = 1

robust s.e. = 1

single country analysis

Constant

2.470

(0.057)

0.850

(0.013)

-0.00748

(0.008)

-0.543^*

(0.274)

-0.0206

(0.017)

1.295^***

(0.302)
0.00454

(0.066)

-3.461^***

(0.549)
0.00477

(0.103)

-0.444^***

(0.109)

0.0381

(0.030)

1.253^***

(0.236)

-0.117

(2.855)

(1.121)

(0.902)

ln σu Random
Constant

1.867***

1.162^***

1.111^***

(0.419)

(0.285)

(0.229)

ln σe Residual

Constant

3.246***

1.907^***

0.352^***

(0.055)

(0.056)

(0.059)

Observations

174

174

174

LR test vs. linear regression

3.642

17.78

141.0

Variation partition component (%)

6

18.4

82