17
Table 1. (continued)
|
Product |
Country |
Summary Statistics |
Entire Pd.1 |
Pre-APBS |
APBS |
CV apbs- |
t-values3 |
F-Values3 |
|
Maize |
Colombia |
Average Standard Deviation Coefficient of Variation |
119,402.16 6,459.52 5.41% |
122,582.32 4,46l8.55 3.65% |
114,183.22 5,267.07 4.61% |
0.97% |
7.179*** |
1.684ns |
|
Ecuador |
Average Standard Deviation Coefficient of Variation |
219,764.08 17,648.99 8.03% |
214,750.64 18,563.22 8.64% |
227,056.37 10,210.28 4.50% |
-4.15% |
3.589* |
1.777* | |
|
Rice |
Venezuela |
Average Standard Deviation Coefficient of Variation |
14,255.78 1,426.10 10.00% |
15,610.20 1,224.37 7.84% |
12,285.72 1,412.13 11.49% |
3.65% |
__*** 10.790 |
1.260ns |
|
Colombia |
Average Standard Deviation Coefficient of Variation |
84,621.92 5,895.24 6.97% |
88,966.43 4,944.30 5.56% |
76,677.68 1,985.29 2.59% |
-2.97% |
__*** 10.556 |
_ _ — ⅛ ⅛ 50.811 | |
|
Ecuador |
Average Standard Deviation Coefficient of Variation |
117,558.91 9,819.12 8.35% |
121,352.18 7,804.62 6.43% |
112,041,41 6,258.53 5.59% |
-0.85% |
_ _ *** 4.703 |
1.582ns | |
|
Venezuela |
Average Standard Deviation Coefficient of Variation |
7,713.93 708.50 9.18% |
8,181.77 463.26 5.66% |
7,033.44 553.91 7.88% |
2.21 |
____*** 5.575 |
_ _ _ _ *** 5.393 |
1 Periods: Entire (January 1990-December 1998), pre-APBS (January 1990 - April 1995) and APBS (May 1995 - December 1998) periods. 2Averages are
calculated based on real prices and are in LCU/MT. The standard deviations are calculated based on the residuals of a time trend-seasonal linear regression. The
coefficient of variation is the ratio of the standard deviation of residuals and average prices. 3The t and F values correspond to the tests of mean and variance
equality, respectively. Further explanation in the text. ***significant at the 1% level; "significant at the 5% level; *significant at the 10% level; ns, not
significant.
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