Consistency or conflict in OECD agricultural trade and
aid policies.
by Dewbre, Joe^Thompson, Wyatt^Dewbre, Joshua
Coeff. Error
Base regression, subsets of data
Including only those countries where:
Ag GDP < $750/worker 0.024 0.016
Ag GDP >$1000/worker -0.003 0.011
Population < 3.8 million 0.009 0.012
Population > 4.5 million 0.003 0.013
Only those countries where aid to agriculture share in agricultural
GDP was:
... below 1 % 0.020 0.016
... below 2.5% -0.003 0.013
... below 5% -0.004 0.008
... above 1 % 0.002 0.007
... above 2.5 % 0.011 0.008
... above 5% 0.020 0.012
Half period: 1986-1994 0.012 0.014
Half period: 1995-2004 0.001 0.010
Alternative variables, base data
NAC instead of NPC 0.004 0.006
Threshold for preference dummy instead of > 1 % of GDP set at:
... at least 0.5% -0.001 0.006
... at least 2% 0.009 0.007
... at least 5% 0.009 0.008
With SSA cross terms NA NA
non-SSA coefficients 0.002 0.006
[R.sup.2]
Base regression, subsets of data
Including only those countries where:
Ag GDP < $750/worker 0.19
Ag GDP >$1000/worker 0.33
Population < 3.8 million 0.42
Population > 4.5 million 0.18
Only those countries where aid to agriculture share in agricultural
GDP was:
... below 1 % 0.32
... below 2.5% 0.33
... below 5% 0.36
... above 1 % 0.13
... above 2.5 % 0.13
... above 5% 0.33
Half period: 1986-1994 0.20
Half period: 1995-2004 0.12
Alternative variables, base data
NAC instead of NPC 0.23
Threshold for preference dummy instead of > 1 % of GDP set at:
... at least 0.5% 0.22
... at least 2% 0.24
... at least 5% 0.24
With SSA cross terms 0.26
non-SSA coefficients
Note: The column headings in this table abbreviate the variable names
that are more fully labeled in the top three rows of table 1. The
complete list of variables in the base equation was retained in all
of these alternatives, but only those results relating to the key
policy variables are reported here. The lop half of the table
represents results obtained when the base equation was estimated over
different subsets of observations. The second half of the table
represents results obtained using the same sample as for the base
equation while changing or adding variables. The last two rows
together contain the complete set of results when including SSA
cross-terms in the regression.
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