Table 3. Estimates of Cross-State Weed Regulatory Congruence, 2002
|
Slope Coefficients a |
Sign of |
List 1 |
List 2 |
List 3 |
List 4 NW |
|
I1. Average Temperature |
Negative |
6.0192* |
77.9172** |
-22.3952** |
27.6193** |
|
. (3.0452) |
. (4.3315) |
. (3.3327) |
. (5.5819) | ||
|
Positive |
-97.3348** |
-39.7359** |
-86.9851** |
-29.2558** | |
|
(4.5406) |
(7.2631) |
(4.9156) |
(8.3285) | ||
|
I2. Average Precipitation |
Negative |
10.7105** |
6.9771** (0.8961) |
5.4450** (0.6867) |
12.7726** |
|
Positive |
-17.9395** |
-18.6396** |
-28.2771** |
2.0383 | |
|
(1.8217) |
(2.6990) |
(2.0377) |
(3.1967) | ||
|
I3. Variance of Temperature |
Negative |
0 0024 |
-0 0064* |
0 0081* |
-0 0162** |
|
. (0.0035) |
. (0.0037) |
. (0.0041) |
. (0.0060) | ||
|
Positive |
-6.5445** |
-6.7927** |
-6.3753** |
-9.3485** | |
|
(1.5217) |
(2.2661) |
(1.6075) |
(2.4415) | ||
|
I4. Variance of Precipitation |
Negative |
0 0000 |
-0 0000 |
0 0001* |
-0 0001 |
|
. (0.0000) |
. (0.0000) |
. (0.0000) |
. (0.0000) | ||
|
Positive |
-5.6056** |
-18.1827** |
-4.0619* |
-7.5137** | |
|
(1.4838) |
(2.2530) |
(1.5871) |
(2.5831) | ||
|
I5. Land Share Index |
Negative |
0.0280 |
0.0421 |
0.0071 |
-0.1023 |
|
(0.0234) |
(0.0393) |
(0.0218) |
(0.0682) | ||
|
Positive |
0.0213 |
0.0377 |
0.0058 |
0.0230 | |
|
(0.0281) |
(0.0473) |
(0.0263) |
(0.0946) | ||
|
I6. Water Share Index |
Negative |
0 2331 |
0 4933** |
0 1009 |
0 0644 |
|
. (0.1419) |
. (0.1867) |
. (0.1687) |
. (0.4540) | ||
|
Positive |
-0.1704 |
-0.6096* |
-0.0178 |
0.0195 | |
|
(0.1149) |
(0.1544) |
(0.1375) |
(0.3803) | ||
|
I7. Soil Share Index |
Negative |
-0 0481 |
-0 2558 |
0 0787 |
-0 5541 |
|
. (0.1862) |
. (0.2809) |
. (0.2197) |
. (0.3862) | ||
|
Positive |
-0.0186 |
0.4315 |
-0.3601 |
0.1504 | |
|
(0.1613) |
(0.24151) |
(0.1876) |
(0.3390) | ||
|
A1. Field Crop Land Share |
Negative |
4 6134** |
8 9766** |
4 3584** |
5 9742** |
|
. (1.3560) |
. (1.9970) |
. (1.3247) |
. (1.7632) | ||
|
Positive |
-11.9382** |
1.2836 |
-15.6365** |
1.6604 | |
|
(2.5060) |
(3.7752) |
(2.7747) |
(3.9808) | ||
|
A2. Irrigated Land Share |
Negative |
0 0254** |
-0 0297 |
0 0577** |
0 0135 |
|
. (0.0098) |
. (0.0163) |
. (0.0117) |
. (0.0154) | ||
|
Positive |
-5.2458** |
-3.3891 |
-1.2897 |
-4.6188* | |
|
(1.3962) |
(2.0586) |
(1.5069) |
(2.3250) | ||
|
ωc: Lobby of Consumer |
Negative |
-0.0626 |
0.0272 |
-0.0468 |
0.2804 |
|
. (0.0324) |
. (0.0499) |
. (0.0362) |
. (0.1814) | ||
|
Positive |
-3.1981* |
0.4738 |
-0.4750 |
-7.5734** | |
|
(1.5602) |
(2.2480) |
(1.7143) |
(2.5308) | ||
|
ωs: Lobby of Seed Industry |
Negative |
-0.0235 |
-0.0631** |
0.0241 |
-0.0576** |
|
. (0.0158) |
. (0.0218) |
. (0.0178) |
. (0.0190) | ||
|
Positive |
-1.7488 |
-1.6051 |
1.8992 |
3.1139 | |
|
(1.4492) |
(2.1602) |
(1.5447) |
(2.3757) | ||
|
ωm: Lobby of Commodity |
Negative |
0.4684** |
0.2360 |
0.6222** |
-0.7174** |
|
Producer |
(0.1139) |
(0.1649) |
(0.1260) |
(0.2241) | |
|
Positive |
-3.7354* |
7.8416** |
-3.4817* |
-2.8600 | |
|
(1.5426) |
_________(2.3017) |
_________(1.6396) |
(2.5521) |
** and * denote significance at the 1% and 5% level, respectively; number in parenthesis is standard error.
aI1 through I7 indicate ecological dissimilarity indexes, A1 and A2 are agronomic dissimilarity indexes, and ωk,
k=c,s,m, denote lobbying dissimilarity indexes.
29
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