ERRATUM (1). In the original published version of Appendix 2, under Geographic Setting, number 7, the following sentence is erroneous:

"Give the mean elevation of the raw material production area expressed as miles above sea level."

The sentence should read:

"Give the mean elevation of the raw material production area expressed as metres above sea level"

[October 1, 2004]


ERRATUM (2). In the original published version of Table 2, the following variable is incorrect:

"Elevation of study area (miles above sea level)"

The variable should be:

"Elevation of study area (metres above sea level)"

The corrected table, in which the correct variable name appears, is provided in full below.

TABLE 2(corrected) : Significant associations for key variables in cases from three regions: Asia, Latin America, and Africa. Values reported are media values. NTFP = Nontimber forest products; Kruskal-Wallis = Kruskal-Wallis nonparametric test (df = 2).

   
Region
 
Kruskal-Wallis
Variables  
 
   
Asia
 
Latin America
 
Africa
 
X2
 
P-value
Population density (persons/km2)  
75.1
 
22.3
 
11.1
 
10.65
 
0.005
Elevation of study area (metres above sea level)  
600
 
200
 
400
 
8.30
 
0.016
Road density (km/km2)  
0.44
 
0.17
 
0.12
 
5.56
 
0.062
Precipitation (mm)  
1859
 
1950
 
944
 
11.02
 
0.004
Percentage of product harvested from wild population  
40
 
97
 
100
 
8.06
 
0.018
Labor intensity in NTFP production
(person-days•ha-1•yr-1)
 
30
 
2
 
4
 
5.68
 
0.058
Land price at purchasing power parity (U.S.$/ha)  
2640
 
675
 
368
 
16.30
 
0.000
Time to harvesting maturity (years)  
7
 
10
 
15
 
6.86
 
0.032
Reproductive period (years)  
5
 
7.5
 
20
 
13.64
 
0.001
Average household size  
5
 
5.5
 
6
 
8.39
 
0.015
Local labor rate (U.S.$/day at purchasing power parity)  
6.55
 
10.25
 
5.62
 
5.23
 
0.073
Number of economically harvestable individual per hectare  
400
 
23
 
17
 
8.17
 
0.017
Value of production (U.S.$•ha-1•yr-1)  
6.82
 
2.74
 
0.43
 
9.02
 
0.011
Estimated raw material trade in area (U.S.$/yr)  
220,000
 
70,000
 
8900
 
11.28
 
0.004
NTFP production area per household (ha)  
5.9
 
45.6
 
132
 
10.77
 
0.005
Total trade (export + national)  
11,230,000
 
2,003,000
 
555,000
 
11.26
 
0.003


[October 22, 2004]