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



Table 4. Signs of Ecological- and Agronomic-Dissimilarity Effects on Weed Regulatory Congruence

Dissimilarity

List 1
NWS_____

List 2

NWS-Prohibited

List 3

NWS-Restricted

List 4
NW____

Negative

1997

Positive

1997

Negative

1997

Positive

1997

Negative

1997

Positive

1997

Negative

1997

Positive

1997

Average Temperature

+

-

+

-

-

-

-

Average Precipitation

+

-

+

-

+

-

+

Variance of Temperature

-

-

-

-

-

Variance of precipitation

+

-

-

+

-

-

-

Land Share Index

-

Water Share Index

-

+

-

-

Soil Share Index

+

-

Irrigated Land Share

-

-

+

-

-

Filed Crop Land Share

+

+

+

+

-

2002

2002

2002

2002

2002

2002

2002

2002

Average Temperature

+

-

+

-

-

-

+

-

Average Precipitation

+

-

+

-

+

-

+

Variance of Temperature

-

-

-

+

-

-

-

Variance of precipitation

-

-

+

-

-

Land Share Index

Water Share Index

+

-

Soil Share Index

Irrigated Land Share

+

-

+

-

Filed Crop Land Share________

______+

______+

_______+

______+

30



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