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

description

count

mean

min

max

agoa coefficient
agoa standard error
T-stat

agoa coefficient reported in studies
standard error reported for agoa coefficient
t CtQtictip rp∙∏pτtpH aag ∏pt ______^αgo^α______ʌ

174

174

174

16.874

20.383

4.137

-11.92

0.000360

-7.579

769.5

1097.127

307.500

t statistic reported (if not, standarderror )

Imputed T-stats from pvalues

t-statistics calculated from inverse t-distribution

25

-0.523

-1.656

2.333

no. of countries

number of countries in study

174

66.126

1

207

no. of years

number of years of data

174

11.989

1

18

no. of explanatory variables

number of explanatory variables (excluding
constant and fixed effects)

174

11.161

2

37

N

sample size

174

3.27e+05

92

9.54e+06

annual = 1

dummy if data is annual

174

0.839

0

1

selection correction = 1

dummy if selection correction was used

174

0.034

0

1

published = 1

dummy for published studies

174

0.494

0

1

country effects = 1

dummy if regression includes country effects

174

0.695

0

1

time effects = 1

dummy if regression includes time effects

174

0.621

0

1

cross section = 1

dummy if data is a cross-section

174

0.029

0

1

other preferences included = 1

dummy if regression includes other preferences
as explanatory variables

174

0.437

0

1

gravity regression = 1

dummy if gravity regression is used

174

0.511

0

1

agoa dummy = 1

dummy if agoa is defined as a 0,1 dummy

174

0.977

0

1

robust s.e. = 1

dummy if White’s heteroscedastic-consistent standard are used
errors are used

174

0.431

0

1

product effects = 1

dummy if product effects are included in the regression

174

0.161

0

1

single country analysis = 1

dummy if data is on a single country

174

0.057

0

1

logged dep. var. = 1

dummy if dependent variables is in logs

174

0.868

0

1

product group = ”All/Total”

dummy for total/all products

174

0.408

0

1

product group = ”Apparel & Textiles”

dummy for apparel and textile products in regression

174

0.092

0

1

product group = ”Agriculture”
reference category is other

dummy for agriculture

174

0.167

0

1

regions included = AGOA countries

dummy if only agoa countries are used in regression

174

0.552

0

1

regions included = AGOA + N. Africa
reference category is World

dummy if Africa is used in the regression

174

0.126

0

1

definition of dep. var. = Exports

dummy if exports are used as dependent variable

174

0.489

0

1

definition of dep. var. = Imports
reference category is other

dummy if imports are used as dependent variable

174

0.477

0

1

time frequency = Annual

dummy if data is annual

174

0.839

0

1

time frequency = Monthly
reference category is quarterly

dummy if data is monthly

174

0.057

0

1

econometric method = GMM

dummy if a GMM approach is used

d 174

0.213

0

1

econometric method = Heckman/Tobit

dummy if Heckman/Tobit model is used

174

0.287

0

1

reference category is other
level of aggregation = Aggregate

dummy if dependent variable is aggregated

174

0.609

0

1

level of aggregation = Less Aggregate
reference category is Least aggregated

dummy if dependent variable is less aggregated

174

0.184

0

1

start year of data

dummy for initial year of data

174

1994.483

1991

2001

end year of data

dummy for final year of data

174

2005.489

2001

2009

Observations

_

174