Rent-Seeking in Noxious Weed Regulations: Evidence from US States



Table 1. Descriptive Statistics on Regulatory Differences and Explanatory Variables
(2256 Observations)

Dependent Variables_______________

_______________Unit

Mean

Std.Dev.

Minimum

Maximum

NWS list regulatory overlap

2002

NA

0.428

0.182

0.083

0.963

1997

NA

0.411

0.186

0.057

1.000

NWS-prohibited list regulatory overlap

2002

NA

0.401

0.269

0.000

1.000

1997

NA

0.320

0.202

0.000

1.000

NWS-restricted regulatory list overlap

2002

NA

0.411

0.269

0.000

1.000

1997

NA

0.319

0.197

0.000

1.000

NW list regulatory overlapa

2002

NA

0.302

0.295

0.000

1.000

1997

NA

0.310

0.268

0.000

1.000

Independent Variables

Lobby Variables

Seed producers

2002

$

108618

189283

550

1040040

1997

$

92233

169980

250

1010680

Consumers

2002

$

364199

551105

2500

2564890

1997

$

253955

624000

5000

4206990

Commodity producers

2002

$

775331

1272660

15865

6476520

1997

$

556395

933924

4550

5179920

Agronomic Variables

Irrigated land share

2002

Acre/Acre

0.177

0.221

0.002

0.794

1997

Acre/Acre

0.178

0.238

0.002

0.901

Field land share

2002

Acre/Acre

0.686

0.171

0.296

1.030

1997

Acre/Acre

0.685

0.172

0.310

1.089

Ecological Variablesb

Average Temperature

January temperature

52.498

7.684

40.161

70.902

Average Precipitation

Days of precipitation

88.450

33.930

21.713

142.551

Variance of Temperature

NA

5.419

6.196

0.000

37.893

Variance of precipitation

NA

266.549

895.464

0.000

4849.02

Land Share Indexc

Index

0

1.00

-1.785

1.8340

Water Share Indexc

Index

0

1.00

-1.210

3.981

Soil Share Indexc_______________________

______________Index

_______0

1.00

-1.447

2.592

a Number of observations is 1190 and 870 respectively for 2002 and 1997
b NORSIS, US Forest Service data.

c Based on principal component analysis.

27



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