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____
Dissimilarity	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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